{"id":2950,"date":"2025-11-28T10:46:40","date_gmt":"2025-11-28T10:46:40","guid":{"rendered":"https:\/\/www.captcha.eu\/?p=2950"},"modified":"2025-11-28T10:47:19","modified_gmt":"2025-11-28T10:47:19","slug":"cose-la-politica-di-sicurezza-dei-contenuti-csp","status":"publish","type":"post","link":"https:\/\/www.captcha.eu\/it\/cose-la-politica-di-sicurezza-dei-contenuti-csp\/","title":{"rendered":"Che cos'\u00e8 il criterio di sicurezza dei contenuti (CSP)?"},"content":{"rendered":"<figure class=\"wp-block-image size-large is-resized\"><img data-dominant-color=\"cfc1a9\" data-has-transparency=\"false\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" src=\"https:\/\/www.captcha.eu\/wp-content\/uploads\/2025\/11\/Design-ohne-Titel-8-1024x576.jpg\" alt=\"Illustrazione della Politica di sicurezza dei contenuti, con una donna in camicia arancione che lavora su un computer portatile. Sul suo schermo appare un modulo web sicuro con icone a forma di lucchetto, un pulsante &quot;SUBMIT&quot; e uno scudo con un segno di spunta. Gli elementi di sfondo includono segnali di avvertimento e un&#039;icona utente, il tutto rappresentato in uno stile di design piatto con toni blu, arancioni e beige.\" class=\"wp-image-2952 not-transparent\" style=\"--dominant-color: #cfc1a9; width:1200px;height:auto\" srcset=\"https:\/\/www.captcha.eu\/wp-content\/uploads\/2025\/11\/Design-ohne-Titel-8-1024x576.jpg 1024w, https:\/\/www.captcha.eu\/wp-content\/uploads\/2025\/11\/Design-ohne-Titel-8-300x169.jpg 300w, https:\/\/www.captcha.eu\/wp-content\/uploads\/2025\/11\/Design-ohne-Titel-8-768x432.jpg 768w, https:\/\/www.captcha.eu\/wp-content\/uploads\/2025\/11\/Design-ohne-Titel-8-1536x864.jpg 1536w, https:\/\/www.captcha.eu\/wp-content\/uploads\/2025\/11\/Design-ohne-Titel-8-18x10.jpg 18w, https:\/\/www.captcha.eu\/wp-content\/uploads\/2025\/11\/Design-ohne-Titel-8.jpg 1920w\" \/><figcaption class=\"wp-element-caption\">Captcha.eu<\/figcaption><\/figure>\n\n\n\n<p>Un Content Security Policy (CSP) \u00e8 un potente livello di sicurezza lato browser che aiuta a prevenire attacchi come l'iniezione di JavaScript, il clickjacking e la manipolazione del codice. Agendo come un firewall digitale all'interno del browser, il CSP controlla quali risorse sono autorizzate a caricare ed eseguire su una pagina web. Questo moderno standard web consente ai gestori dei siti di controllare con precisione gli script, gli stili e i servizi di terze parti di cui si fidano le loro pagine web, bloccando tutto il resto.<\/p>\n\n\n\n<p>Definendo un elenco di fonti attendibili, CSP riduce in modo significativo il rischio di cross-site scripting (XSS) e altri attacchi di tipo iniettivo, rendendolo una parte essenziale della strategia di sicurezza web di qualsiasi applicazione.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>Sommario<\/h2><ul><li><a href=\"#h-how-content-security-policy-works-in-the-browser\" data-level=\"2\">Come funzionano i criteri di sicurezza dei contenuti nel browser<\/a><\/li><li><a href=\"#h-why-csp-matters-real-threats-it-blocks\" data-level=\"2\">Perch\u00e9 il CSP \u00e8 importante: Le minacce reali che blocca<\/a><\/li><li><a href=\"#h-csp-and-secure-development-practices\" data-level=\"2\">CSP e pratiche di sviluppo sicure<\/a><\/li><li><a href=\"#h-common-csp-challenges-and-how-to-address-them\" data-level=\"2\">Le sfide comuni dei CSP e come affrontarle<\/a><\/li><li><a href=\"#h-troubleshooting-csp-how-to-resolve-policy-errors\" data-level=\"2\">Risoluzione dei problemi di CSP: come risolvere gli errori dei criteri<\/a><\/li><li><a href=\"#h-why-captcha-and-csp-work-hand-in-hand\" data-level=\"2\">Perch\u00e9 CAPTCHA e CSP funzionano a braccetto<\/a><\/li><li><a href=\"#h-conclusion\" data-level=\"2\">Conclusione<\/a><\/li><li><a href=\"#h-faq-frequently-asked-questions\" data-level=\"2\">FAQ \u2013 Domande frequenti<\/a><\/li><\/ul><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-a64c21a8c33ff0b42783f15004105285\" id=\"h-how-content-security-policy-works-in-the-browser\" style=\"color:#2b7ca4\">Come funzionano i criteri di sicurezza dei contenuti nel browser<\/h2>\n\n\n\n<p>Il CSP viene fornito al browser tramite l'intestazione di risposta HTTP Content-Security-Policy. Questa intestazione contiene una o pi\u00f9 direttive, ciascuna delle quali specifica le regole per diversi tipi di risorse: script, fogli di stile, immagini, font, frame, ecc.<\/p>\n\n\n\n<p>Ad esempio, un criterio potrebbe consentire solo contenuti provenienti dal proprio dominio, fonti di script specifiche e affidabili e bloccare esplicitamente l'inclusione delle proprie pagine negli iframe. Limitando la provenienza dei contenuti, CSP blocca gli script non autorizzati, impedisce agli aggressori di iniettare payload dannosi e impone pratiche di codifica sicure.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-a94614a0c4ebc2f1890cdd7bb356c238\" id=\"h-why-csp-matters-real-threats-it-blocks\" style=\"color:#2b7ca4\">Perch\u00e9 il CSP \u00e8 importante: Le minacce reali che blocca<\/h2>\n\n\n\n<p>I proprietari di siti web utilizzano pi\u00f9 comunemente CSP per bloccare gli attacchi cross-site scripting (XSS). Quando una vulnerabilit\u00e0 consente agli aggressori di iniettare JavaScript dannoso, CSP impedisce al browser di eseguire lo script a meno che non provenga da una fonte approvata.<\/p>\n\n\n\n<p>CSP impedisce agli aggressori di caricare il vostro sito all'interno di frame nascosti nelle loro pagine, una tecnica comune di clickjacking. Controllando esplicitamente quali siti web possono incorporare i vostri contenuti, bloccate queste configurazioni ingannevoli e impedite agli aggressori di indurre gli utenti a fare clic su elementi mascherati.<\/p>\n\n\n\n<p>Inoltre, CSP aiuta a far rispettare l'HTTPS in tutto il sito aggiornando automaticamente le richieste di risorse da <a href=\"https:\/\/www.captcha.eu\/it\/cose-lhttp\/\">HTTP<\/a> per proteggere HTTPS, contribuendo a mantenere una postura di sicurezza coerente.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-ffe15f35f443ed9395fe47fefadc2fb6\" id=\"h-csp-and-secure-development-practices\" style=\"color:#2b7ca4\">CSP e pratiche di sviluppo sicure<\/h2>\n\n\n\n<p>CSP supporta gli standard di settore e i requisiti di conformit\u00e0 come PCI DSS 4.0 e GDPR. Fornisce una protezione efficace contro le minacce di iniezione di script zero-day e aggiunge un ulteriore livello di controllo alle moderne pratiche di sviluppo web. Per una compatibilit\u00e0 perfetta, captcha.eu offre un'integrazione CAPTCHA pronta per il CSP. Vedere l'elenco completo <a href=\"https:\/\/docs.captcha.eu\/csp\">Documentazione CSP captcha.eu<\/a> per una guida.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-b5ee8f986839918fb654dd7dca9ae68c\" id=\"h-common-csp-challenges-and-how-to-address-them\" style=\"color:#2b7ca4\">Le sfide comuni dei CSP e come affrontarle<\/h2>\n\n\n\n<p>Gli script e gli stili in linea rappresentano una sfida perch\u00e9 CSP li blocca per impostazione predefinita. Questo costringe gli sviluppatori a ripensare il modo in cui gli script vengono aggiunti alla pagina. Invece di consentire script in linea non sicuri, l'approccio consigliato \u00e8 quello di utilizzare non-code o hash.<\/p>\n\n\n\n<p>Un nonce \u00e8 un valore univoco e casuale generato sul server che deve corrispondere sia all'intestazione del CSP che al corrispondente tag  o . In alternativa, gli hash consentono di specificare il contenuto esatto che \u00e8 consentito eseguire. Entrambe le tecniche rafforzano la sicurezza senza sacrificare la flessibilit\u00e0.<\/p>\n\n\n\n<p>Per garantire un'implementazione senza intoppi, iniziare a eseguire il criterio in modalit\u00e0 di sola segnalazione, utilizzando l'intestazione Content-Security-Policy-Report-Only. Questo approccio consente di monitorare quali risorse verrebbero bloccate, senza influire sull'esperienza dell'utente. \u00c8 un modo intelligente per mettere a punto i criteri e individuare potenziali problemi prima dell'applicazione completa.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-a2e51ae7424d1a0db9585e8b7c07d9d7\" id=\"h-troubleshooting-csp-how-to-resolve-policy-errors\" style=\"color:#2b7ca4\">Risoluzione dei problemi di CSP: come risolvere gli errori dei criteri<\/h2>\n\n\n\n<p>Anche le politiche ben preparate possono dare luogo a violazioni inaspettate. In caso di problemi, la console del browser fornisce messaggi di errore dettagliati che mostrano esattamente quale risorsa \u00e8 stata bloccata e perch\u00e9.<\/p>\n\n\n\n<p>Per il test e il debugging, captcha.eu offre un servizio di live <a href=\"https:\/\/www.captcha.eu\/it\/api\/csp_demo\/overview\/\">Ambiente demo CSP<\/a>dove \u00e8 possibile simulare l'interazione dei propri criteri con le funzioni CAPTCHA. Se i problemi persistono, consultare la sezione <a href=\"https:\/\/docs.captcha.eu\/csp\">Documentazione di captcha.eu<\/a> o contattare l'assistenza con i log degli errori per ottenere un aiuto personalizzato.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-c2c9e6cd72e088a1f798a21118f30fa0\" id=\"h-why-captcha-and-csp-work-hand-in-hand\" style=\"color:#2b7ca4\">Perch\u00e9 CAPTCHA e CSP funzionano a braccetto<\/h2>\n\n\n\n<p>Il CSP limita l'esecuzione degli script, ma non distingue tra esseri umani e bot. \u00c8 qui che entra in gioco il CAPTCHA. Per evitare abusi nei moduli di login, nei campi per i commenti e nei gateway di pagamento, una soluzione CAPTCHA \u00e8 essenziale.<\/p>\n\n\n\n<p>La tecnologia CAPTCHA di captcha.eu, conforme al GDPR, \u00e8 pienamente compatibile con i rigorosi ambienti CSP. Fornisce una verifica non invasiva dell'utente senza compromettere la sicurezza del browser. Insieme, CSP e CAPTCHA formano un modello di protezione completo per i siti web moderni.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-72de50b6cabed51cc3dd00d967bab9d4\" id=\"h-conclusion\" style=\"color:#2b7ca4\">Conclusione<\/h2>\n\n\n\n<p>CSP offre potenti difese contro gli script iniettati e il caricamento di contenuti non autorizzati. Protegge le sessioni degli utenti, supporta la conformit\u00e0 alla privacy e riduce la superficie di attacco, il tutto dall'interno del browser.<\/p>\n\n\n\n<p>Quando si combina il CSP con strumenti di rilevamento dei bot e di verifica umana come <a href=\"https:\/\/www.captcha.eu\/it\/\">captcha.eu<\/a>CSP rafforza la vostra difesa contro le minacce basate sul browser e gli attacchi automatici. Se state costruendo o mettendo in sicurezza una piattaforma web, fate del CSP una delle vostre prime linee di difesa, implementatelo con cura, testatelo a fondo e mantenetelo costantemente.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-cbff7adca8489518fa087943784c86d6\" id=\"h-faq-frequently-asked-questions\" style=\"color:#2b7ca4\">FAQ \u2013 Domande frequenti<\/h2>\n\n\n\n<div class=\"wp-block-premium-accordion premium-accordion premium-accordion-24369f49bb08\">\n<div class=\"wp-block-premium-accordion-item premium-accordion-item-086113a8a374 premium-accordion__content_wrap\"><div class=\"premium-accordion__title_wrap premium-accordion__ltr premium-accordion__out\"><div class=\"premium-accordion__title\"><h4 class=\"premium-accordion__title_text\">Che cos'\u00e8 il criterio di sicurezza dei contenuti (CSP)?<\/h4><\/div><div class=\"premium-accordion__icon_wrap\"><svg class=\"premium-accordion__icon\" role=\"img\" focusable=\"false\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 20 20\"><polygon points=\"16.7,3.3 10,10 3.3,3.4 0,6.7 10,16.7 10,16.6 20,6.7 \"><\/polygon><\/svg><\/div><\/div><div class=\"premium-accordion__desc_wrap\"><p class=\"premium-accordion__desc\">Il CSP \u00e8 uno standard di sicurezza che aiuta a prevenire attacchi come il cross-site scripting (XSS), il clickjacking e l'iniezione di codice maligno controllando quali risorse un browser pu\u00f2 caricare ed eseguire su un sito web.<\/p><\/div><\/div>\n\n\n\n<div class=\"wp-block-premium-accordion-item premium-accordion-item-595eb7932f83 premium-accordion__content_wrap\"><div class=\"premium-accordion__title_wrap premium-accordion__ltr premium-accordion__out\"><div class=\"premium-accordion__title\"><h4 class=\"premium-accordion__title_text\">Perch\u00e9 il CSP \u00e8 importante per la sicurezza dei siti web?<\/h4><\/div><div class=\"premium-accordion__icon_wrap\"><svg class=\"premium-accordion__icon\" role=\"img\" focusable=\"false\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 20 20\"><polygon points=\"16.7,3.3 10,10 3.3,3.4 0,6.7 10,16.7 10,16.6 20,6.7 \"><\/polygon><\/svg><\/div><\/div><div class=\"premium-accordion__desc_wrap\"><p class=\"premium-accordion__desc\">CSP funge da firewall lato browser, riducendo il rischio di attacchi lato client. Impone regole severe per il caricamento di script, immagini e altre risorse, proteggendo gli utenti e i dati sensibili.<\/p><\/div><\/div>\n\n\n\n<div class=\"wp-block-premium-accordion-item premium-accordion-item-ec6da3311501 premium-accordion__content_wrap\"><div class=\"premium-accordion__title_wrap premium-accordion__ltr premium-accordion__out\"><div class=\"premium-accordion__title\"><h4 class=\"premium-accordion__title_text\">Come fa il CSP a prevenire gli attacchi XSS?<\/h4><\/div><div class=\"premium-accordion__icon_wrap\"><svg class=\"premium-accordion__icon\" role=\"img\" focusable=\"false\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 20 20\"><polygon points=\"16.7,3.3 10,10 3.3,3.4 0,6.7 10,16.7 10,16.6 20,6.7 \"><\/polygon><\/svg><\/div><\/div><div class=\"premium-accordion__desc_wrap\"><p class=\"premium-accordion__desc\">CSP blocca l'esecuzione di script non autorizzati, consentendo l'esecuzione di JavaScript solo da fonti affidabili. In questo modo si impedisce agli aggressori di iniettare ed eseguire codice dannoso tramite l'input dell'utente o script vulnerabili di terze parti.<\/p><\/div><\/div>\n\n\n\n<div class=\"wp-block-premium-accordion-item premium-accordion-item-528bab97421c premium-accordion__content_wrap\"><div class=\"premium-accordion__title_wrap premium-accordion__ltr premium-accordion__out\"><div class=\"premium-accordion__title\"><h4 class=\"premium-accordion__title_text\">Cosa sono le direttive CSP?<\/h4><\/div><div class=\"premium-accordion__icon_wrap\"><svg class=\"premium-accordion__icon\" role=\"img\" focusable=\"false\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 20 20\"><polygon points=\"16.7,3.3 10,10 3.3,3.4 0,6.7 10,16.7 10,16.6 20,6.7 \"><\/polygon><\/svg><\/div><\/div><div class=\"premium-accordion__desc_wrap\"><p class=\"premium-accordion__desc\">Le direttive CSP sono regole specifiche che definiscono le fonti di contenuto consentite. Le direttive pi\u00f9 comuni includono default-src, script-src, img-src e frame-ancestors, ognuna delle quali controlla diversi tipi di contenuto.<\/p><\/div><\/div>\n\n\n\n<div class=\"wp-block-premium-accordion-item premium-accordion-item-4dbe092d2ebd premium-accordion__content_wrap\"><div class=\"premium-accordion__title_wrap premium-accordion__ltr premium-accordion__out\"><div class=\"premium-accordion__title\"><h4 class=\"premium-accordion__title_text\">Che cos'\u00e8 la modalit\u00e0 CSP Report-Only?<\/h4><\/div><div class=\"premium-accordion__icon_wrap\"><svg class=\"premium-accordion__icon\" role=\"img\" focusable=\"false\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 20 20\"><polygon points=\"16.7,3.3 10,10 3.3,3.4 0,6.7 10,16.7 10,16.6 20,6.7 \"><\/polygon><\/svg><\/div><\/div><div class=\"premium-accordion__desc_wrap\"><p class=\"premium-accordion__desc\">La modalit\u00e0 Report-Only consente agli sviluppatori di testare un criterio CSP senza applicarlo. Il browser registra le violazioni, aiutando i proprietari dei siti a perfezionare i criteri prima della distribuzione completa senza interrompere le funzionalit\u00e0.<\/p><\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background-color has-text-color has-background has-link-color wp-elements-f0053231231cbd97b0464e4db5840e87 is-vertical is-content-justification-center is-layout-flex wp-container-core-group-is-layout-ce155fab wp-block-group-is-layout-flex\" style=\"border-radius:20px;background-color:#f0faf3\">\n<h2 class=\"wp-block-heading has-foreground-color has-text-color has-link-color has-large-font-size wp-elements-b5699e1a129fe1a30ab792feee8ae242\"><strong>100 richieste gratuite<\/strong><\/h2>\n\n\n\n<p class=\"has-foreground-color has-text-color has-link-color wp-elements-b49cc1b9513f565de22aa575e471cab2\">Hai la possibilit\u00e0 di testare e provare il nostro prodotto con 100 richieste gratuite.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background-color has-text-color has-background wp-element-button\" href=\"https:\/\/www.captcha.eu\/dashboard\/\" style=\"background-color:#77af84\">Inizia la prova<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background-color has-text-color has-background has-link-color wp-elements-af00b1d79068a7b2dfaed3c6a27bcc40 is-vertical is-content-justification-center is-layout-flex wp-container-core-group-is-layout-ce155fab wp-block-group-is-layout-flex\" style=\"border-radius:20px;background-color:#68c1eb;min-height:370px\">\n<p class=\"has-background-color has-text-color has-link-color has-normal-font-size wp-elements-eebd210dd9d74a0906c3b070c47966be\"><strong>Se hai qualche domanda<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-background-color has-text-color has-link-color has-large-font-size wp-elements-ca0e088edbf969fa6cc0ffaa1ba6c01c\" id=\"h-contact-us\"><strong>Contattaci<\/strong><\/h2>\n\n\n\n<p class=\"has-background-color has-text-color has-link-color wp-elements-316b59d0711ce3cc25ea0c989740e1ea\">Il nostro team di supporto \u00e8 disponibile per assisterti.<br><\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-foreground-color has-background-background-color has-text-color has-background wp-element-button\" href=\"javascript:goToContact();\">Contattaci<\/a><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A Content Security Policy (CSP) is a powerful browser-side security layer that helps prevent attacks like JavaScript injection, clickjacking, and code manipulation. Acting as a digital firewall inside the browser, CSP controls which resources are allowed to load and execute on a webpage. 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