Practical guides on Content Security Policy (CSP): building, deploying, monitoring and fixing CSP for real-world web applications.https://info.centralcsp.com/enhttps://info.centralcsp.com/articles/csp-bypass-techniques/https://info.centralcsp.com/articles/csp-bypass-techniques/Allowlisted CDNs that host arbitrary code, JSONP endpoints, open redirects, a missing base-uri and unsafe-eval are the ways a policy that looks strict gets walked around. What each bypass needs, how to close it, and why a successful bypass never appears in your violation reports.Mon, 21 Sep 2026 00:00:00 GMTcspbypassxssstrict-dynamicjsonpnoncehttps://info.centralcsp.com/articles/csp-in-ci-cd-pipeline/https://info.centralcsp.com/articles/csp-in-ci-cd-pipeline/A three-layer setup for catching CSP regressions before users do: the policy diff in code review, a scored scan that fails the build on a preview URL, and report-only on staging and production for the traffic your pipeline will never generate.Mon, 21 Sep 2026 00:00:00 GMTcspci-cdtestingstagingapidevopshttps://info.centralcsp.com/articles/pci-dss-payment-page-tag-manager/https://info.centralcsp.com/articles/pci-dss-payment-page-tag-manager/A tag manager is one authorized script that loads scripts you never approved, which is the exact thing 6.4.3 asks you to control. What an assessor expects, why a crawl cannot produce the inventory, and how to handle container hash rotation without drowning the change log.Mon, 21 Sep 2026 00:00:00 GMTpci-dssgtmtag-managerpayment-page6.4.3script-inventoryhttps://info.centralcsp.com/articles/reporting-endpoints-all-report-types/https://info.centralcsp.com/articles/reporting-endpoints-all-report-types/The default endpoint in Reporting-Endpoints does not collect everything. CSP, COOP, COEP and Permissions-Policy each route themselves, deprecations and crashes fall through to default, and NEL still needs the old header. What lands where, and what gets dropped.Mon, 21 Sep 2026 00:00:00 GMTreporting-apireporting-endpointscspnelreport-tohttps://info.centralcsp.com/articles/best-content-security-policy-reporting-tool-2026/https://info.centralcsp.com/articles/best-content-security-policy-reporting-tool-2026/How to evaluate a Content Security Policy reporting tool in 2026: retention, noise filtering, policy generation, script inventory, alerting, export, data location and pricing model. With how the current market scores on each, and where CentralCSP lands.Tue, 11 Aug 2026 00:00:00 GMTcontent-security-policycsp-reportingbuying-guideevaluationcsp-monitoringcentralcsphttps://info.centralcsp.com/articles/best-csp-reporting-tool/https://info.centralcsp.com/articles/best-csp-reporting-tool/A ranked shortlist of CSP reporting tools as of August 2026, with entry prices, retention windows, data location and what each one does after it collects the report. CentralCSP comes first, and the reasoning is spelled out.Tue, 11 Aug 2026 00:00:00 GMTcsp-reportingbest-toolscsp-monitoringcomparisonreport-uricentralcsphttps://info.centralcsp.com/articles/build-vs-buy-csp-report-collector/https://info.centralcsp.com/articles/build-vs-buy-csp-report-collector/Self-hosting CSP violation collection looks like an afternoon of work and turns into a permanent engineering commitment: noise filtering, report volume spikes, aggregation, maintenance. Why it ends up costing more than any SaaS.Sun, 09 Aug 2026 00:00:00 GMTcspself-hostedreport-urireporting-endpointsdevopshttps://info.centralcsp.com/articles/catch-magecart-attack-csp/https://info.centralcsp.com/articles/catch-magecart-attack-csp/A web skimmer betrays itself twice: when the malicious script loads on your checkout, and when it POSTs card data to an attacker origin. How CSP monitoring catches both signals from real visitors within minutes, and how an enforced connect-src can block the exfiltration outright.Sun, 09 Aug 2026 00:00:00 GMTmagecartweb-skimmingformjackingcspscript-inventoryalertingpci-dsshttps://info.centralcsp.com/articles/centralcsp-vs-report-uri/https://info.centralcsp.com/articles/centralcsp-vs-report-uri/A factual comparison of CentralCSP and Report URI: pricing (€39.99 vs $65.99 entry), EU vs US data processing, retention, report types, script inventory, PCI DSS 6.4.3/11.6.1 features, alerting and API access.Sun, 09 Aug 2026 00:00:00 GMTreport-uricomparisoncsp-monitoringpricingpci-dsshttps://info.centralcsp.com/articles/checkout-page-new-script-alerts/https://info.centralcsp.com/articles/checkout-page-new-script-alerts/Magecart skimmers arrive as one new or altered script on your payment pages. How to detect that within minutes with browser-sourced monitoring via the CSP header, alerts on new script origins and unjustified payment-page scripts, sent to Slack, Teams, email or your SIEM. No agent on the page.Sun, 09 Aug 2026 00:00:00 GMTalertingscript-inventorymagecartpayment-pagescspmonitoringhttps://info.centralcsp.com/articles/clickjacking-explained/https://info.centralcsp.com/articles/clickjacking-explained/Clickjacking loads your site in an invisible iframe so victims click your buttons without knowing. The fix is the CSP frame-ancestors directive sent as an HTTP header, with X-Frame-Options as a fallback for older browsers.Sun, 09 Aug 2026 00:00:00 GMTclickjackingframe-ancestorsx-frame-optionscsphttps://info.centralcsp.com/articles/cookie-theft-session-hijacking/https://info.centralcsp.com/articles/cookie-theft-session-hijacking/A stolen session cookie is a logged-in user: no password needed, MFA already passed. How cookie theft actually works, what HttpOnly, Secure and SameSite each do, and where CSP covers what the flags cannot.Sun, 09 Aug 2026 00:00:00 GMTcookiessession-hijackingxssclient-side-securityhttps://info.centralcsp.com/articles/csp-alerts-slack-splunk-pagerduty/https://info.centralcsp.com/articles/csp-alerts-slack-splunk-pagerduty/How CentralCSP, Report URI, Sentry and Datadog deliver CSP violation alerts to Slack, Splunk, PagerDuty and webhooks. Six native channels (Slack, Teams, Google Chat, Telegram, email, signed webhooks), unlimited alerts from €129.99/mo, versus email plus DIY webhook recipes at Report URI (Aug 2026).Sun, 09 Aug 2026 00:00:00 GMTalertingslacksplunkpagerdutywebhookscspmonitoringhttps://info.centralcsp.com/articles/csp-for-saas-platforms/https://info.centralcsp.com/articles/csp-for-saas-platforms/Where CSP matters for a B2B SaaS: the enterprise questionnaire that asks about it, the rating vendors scoring your headers, and the logged-in app where a compromised script would hurt most. Why SPAs complicate it, and why crawler-based tools stop at your login page.Sun, 09 Aug 2026 00:00:00 GMTcspsaasspasecurity-headerssecurity-questionnaireshttps://info.centralcsp.com/articles/csp-monitoring-for-agencies/https://info.centralcsp.com/articles/csp-monitoring-for-agencies/One CentralCSP site per client: 3 to 30 sites by tier from €39.99/month, per-site roles so a client only sees their own data, alert rules routed per client from Business (€129.99), a REST API to feed your own client reports, and a free scanner that doubles as an audit-phase deliverable.Sun, 09 Aug 2026 00:00:00 GMTagenciesmulti-sitecsp-monitoringclient-reportingsecurity-headershttps://info.centralcsp.com/articles/csp-monitoring-for-banks-eu-data-residency/https://info.centralcsp.com/articles/csp-monitoring-for-banks-eu-data-residency/CSP violation reports are browser telemetry from your customers. What financial institutions should require from a CSP monitoring vendor: EU hosting, GDPR posture, bounded retention, and audit evidence.Sun, 09 Aug 2026 00:00:00 GMTbanksfinancial-servicesgdpreu-hostingdata-residencycsphttps://info.centralcsp.com/articles/csp-monitoring-for-ecommerce/https://info.centralcsp.com/articles/csp-monitoring-for-ecommerce/An online store concentrates its risk on one page (checkout) and one attack (skimming), while its marketing stack injects scripts weekly. What CSP monitoring must deliver: script inventory on payment paths, checkout-scoped alerts in minutes, enforced connect-src, PCI DSS evidence.Sun, 09 Aug 2026 00:00:00 GMTecommercecheckoutskimmingmagecartcsppci-dssmonitoringhttps://info.centralcsp.com/articles/csp-monitoring-for-small-teams/https://info.centralcsp.com/articles/csp-monitoring-for-small-teams/Report URI dropped its free tier in 2025 and entry now costs $65.99/month. What small teams can pay instead: CentralCSP Start at €39.99/month with 3 sites, 250,000 reports, the policy builder and script inventory included, versus URIports at €1 and Csper's dormant free tier.Sun, 09 Aug 2026 00:00:00 GMTpricingsmall-teamscsp-monitoringcomparisonreport-urihttps://info.centralcsp.com/articles/csp-monitoring-for-startups/https://info.centralcsp.com/articles/csp-monitoring-for-startups/A staged CSP roadmap for early-stage teams: free scanner and report-only header on day one, a managed endpoint from €39.99/month once customers arrive, alerting at Business when someone is on call, and where enterprise questionnaires and PCI DSS actually force the upgrade.Sun, 09 Aug 2026 00:00:00 GMTstartupssecurity-headerscsp-monitoringroadmapsaashttps://info.centralcsp.com/articles/csp-nonces-vs-hashes/https://info.centralcsp.com/articles/csp-nonces-vs-hashes/Nonces need a fresh random value on every response, hashes need stable script content. Which strict CSP strategy fits your stack: server-rendered apps, static sites, CDNs, and the caching traps in between.Sun, 09 Aug 2026 00:00:00 GMTcspnoncehashesstrict-dynamicunsafe-inlinehttps://info.centralcsp.com/articles/csp-pci-dss-score/https://info.centralcsp.com/articles/csp-pci-dss-score/CentralCSP's free scanner grades any URL or pasted policy 0–100 on security and quality, no account needed. It tells you how strict the policy is, not whether you pass 6.4.3 and 11.6.1: that mapping and the evidence live in the Scale PCI DSS module. What each does, and when to move up.Sun, 09 Aug 2026 00:00:00 GMTpci-dsscsp-scannercompliancecsp-scorepayment-pageshttps://info.centralcsp.com/articles/csp-upgrade-insecure-requests-ignored-report-only/https://info.centralcsp.com/articles/csp-upgrade-insecure-requests-ignored-report-only/Chrome logs this warning when upgrade-insecure-requests sits in a Content-Security-Policy-Report-Only header. Nothing is broken. Here is why the directive cannot work in report-only mode and where to put it instead.Sun, 09 Aug 2026 00:00:00 GMTcspupgrade-insecure-requestsreport-onlymixed-contentconsole-warningshttps://info.centralcsp.com/articles/csp-without-security-engineer/https://info.centralcsp.com/articles/csp-without-security-engineer/A workable CSP process for a dev team with no security engineer: browser-sourced reporting does the discovery and triage, you do a 30-minute weekly review. What to automate, what to skip, and when to pay for alerting.Sun, 09 Aug 2026 00:00:00 GMTcspsmall-teamsprocesssecurity-headersmaintenancehttps://info.centralcsp.com/articles/detect-third-party-script-changes/https://info.centralcsp.com/articles/detect-third-party-script-changes/Comparing ways to detect a modified third-party script: SRI blocking, agent-based platforms like c/side, and browser-sourced SHA-256 hash monitoring with drift alerts. What each catches, what each costs, and where each breaks.Sun, 09 Aug 2026 00:00:00 GMTsupply-chainscript-monitoringhash-driftsrialertinghttps://info.centralcsp.com/articles/detect-vulnerable-scripts-cve/https://info.centralcsp.com/articles/detect-vulnerable-scripts-cve/npm audit only sees what is declared in your repo. The browser also runs scripts injected by tag managers, CMS plugins and vendors. How to inventory what actually executes in production and match it against CVE databases, hash by hash.Sun, 09 Aug 2026 00:00:00 GMTscript-inventorycvevulnerabilitiesthird-party-scriptssupply-chainhttps://info.centralcsp.com/articles/eu-hosted-csp-monitoring-tools/https://info.centralcsp.com/articles/eu-hosted-csp-monitoring-tools/CSP monitoring services compared by data location, August 2026: CentralCSP and URIports process violation reports in the EU, Report URI processes on US infrastructure per its own documentation, and the US tools each come with caveats.Sun, 09 Aug 2026 00:00:00 GMTgdpreu-hostingdata-residencycsp-monitoringcomparisonreport-urihttps://info.centralcsp.com/articles/how-long-csp-report-only/https://info.centralcsp.com/articles/how-long-csp-report-only/The honest answer: 1 to 4 weeks of representative traffic. What representative actually means, the three signals that tell you discovery is done, and the traps of both stopping too early and never enforcing at all.Sun, 09 Aug 2026 00:00:00 GMTcspreport-onlyenforcementrolloutdiscoveryhttps://info.centralcsp.com/articles/how-xss-attacks-work/https://info.centralcsp.com/articles/how-xss-attacks-work/XSS happens when untrusted input becomes markup in someone else's browser. How reflected, stored and DOM-based XSS differ, what an attacker gains, and why escaping plus a strict CSP is the combination that actually holds.Sun, 09 Aug 2026 00:00:00 GMTxsssecuritycspinjectionclient-sidehttps://info.centralcsp.com/articles/monitor-multiple-websites-csp/https://info.centralcsp.com/articles/monitor-multiple-websites-csp/Agencies and multi-brand groups need per-site CSP policies and reporting in one place. How CentralCSP (3 to 30 sites, Enterprise custom), Report URI (max 5 domains, Aug 2026) and URIports compare for multi-site monitoring.Sun, 09 Aug 2026 00:00:00 GMTmulti-siteagenciescsp-monitoringcomparisondashboardhttps://info.centralcsp.com/articles/pci-dss-6-4-3-and-11-6-1-payment-page-requirements/https://info.centralcsp.com/articles/pci-dss-6-4-3-and-11-6-1-payment-page-requirements/PCI DSS v4 requirements 6.4.3 and 11.6.1 are mandatory since March 31, 2025. Here is what they actually require (script inventory, integrity, tamper detection) and how to comply without an army of consultants.Sun, 09 Aug 2026 00:00:00 GMTpci-dsscompliance6.4.311.6.1payment-pagescsphttps://info.centralcsp.com/articles/prove-payment-scripts-unchanged/https://info.centralcsp.com/articles/prove-payment-scripts-unchanged/What QSAs actually request under PCI DSS 6.4.3 and 11.6.1: a current script inventory with justifications, integrity hashes per script, and a change log covering the assessment period. Why screenshots fail, and how to build the evidence pack before the auditor asks.Sun, 09 Aug 2026 00:00:00 GMTpci-dssaudit-evidence6.4.311.6.1qsapayment-pageshttps://info.centralcsp.com/articles/report-only-to-enforced-migration/https://info.centralcsp.com/articles/report-only-to-enforced-migration/A rollout runbook for switching from Content-Security-Policy-Report-Only to an enforced header: clean the report stream, wait for a real quiet period, enforce path by path with both headers running, and keep a rollback that is a header change, not a deploy.Sun, 09 Aug 2026 00:00:00 GMTcspreport-onlyenforcementrolloutmigrationhttps://info.centralcsp.com/articles/report-uri-alternatives/https://info.centralcsp.com/articles/report-uri-alternatives/Looking for a Report URI alternative after the free tier removal and price restructure? Honest comparison of CentralCSP, URIports, Csper, Sentry, Datadog, c/side, enterprise agents and self-hosting.Sun, 09 Aug 2026 00:00:00 GMTreport-urialternativescsp-monitoringcomparisonclient-side-securityhttps://info.centralcsp.com/articles/report-uri-vs-report-to-vs-reporting-endpoints/https://info.centralcsp.com/articles/report-uri-vs-report-to-vs-reporting-endpoints/Three overlapping mechanisms deliver CSP violation reports, and the browser support picture changed in March 2026. What each one does, how the report formats differ, and the header combination to deploy today.Sun, 09 Aug 2026 00:00:00 GMTcspreport-urireport-toreporting-endpointsreporting-apiviolation-reportshttps://info.centralcsp.com/articles/script-inventory-without-an-agent/https://info.centralcsp.com/articles/script-inventory-without-an-agent/CentralCSP builds a script inventory from one response header, using CSP report-sha256/384/512 hashes reported by real visitors. How that compares with agent-based tools like c/side, Source Defense, Jscrambler and HUMAN, and what each approach can and cannot see.Sun, 09 Aug 2026 00:00:00 GMTscript-inventoryagentlessthird-party-scriptsclient-side-securitycomparisonhttps://info.centralcsp.com/articles/security-teams-third-party-scripts/https://info.centralcsp.com/articles/security-teams-third-party-scripts/Marketing, product teams and agencies add scripts faster than any review process can track them. How to replace inventory-by-asking with a browser-sourced script inventory on every property, alert rules routed to the SOC, and an approval workflow that leaves a record.Sun, 09 Aug 2026 00:00:00 GMTscript-governancesecurity-teamsthird-party-scriptsshadow-itsupply-chainhttps://info.centralcsp.com/articles/test-csp-without-deploying/https://info.centralcsp.com/articles/test-csp-without-deploying/Three ways to try a Content Security Policy change without touching production: rewrite the live CSP in your own browser with a free Chrome extension, score the policy with a free evaluator, or run report-only in staging. A workflow that cuts iteration from a deploy cycle to 5 seconds.Sun, 09 Aug 2026 00:00:00 GMTcsptestingchrome-extensionevaluatorworkflowhttps://info.centralcsp.com/articles/turn-csp-reports-into-policy/https://info.centralcsp.com/articles/turn-csp-reports-into-policy/Crawler-based CSP generators miss authenticated pages and geo-gated content. Traffic-based generators like Report URI's CSP Wizard and CentralCSP's Builder create the policy from real violation reports. How they compare, and the report-only workflow that gets you to enforcement.Sun, 09 Aug 2026 00:00:00 GMTcsp-generatorcsp-builderreport-onlycsp-wizardcomparisonhttps://info.centralcsp.com/articles/what-is-a-content-security-policy/https://info.centralcsp.com/articles/what-is-a-content-security-policy/A Content Security Policy is an HTTP header that tells browsers which resources a page may load. Learn how CSP blocks XSS attacks and how to deploy one safely.Sun, 09 Aug 2026 00:00:00 GMTcspsecurityxsshttp-headershttps://info.centralcsp.com/articles/what-is-client-side-security/https://info.centralcsp.com/articles/what-is-client-side-security/Client-side security protects what happens in your visitors' browsers: XSS, script supply-chain compromise, session theft, clickjacking. A survey of the attack families and the defenses that cover them: CSP, SRI, cookie flags and violation reporting.Sun, 09 Aug 2026 00:00:00 GMTclient-side-securitybrowserfundamentalscsphttps://info.centralcsp.com/articles/why-is-csp-blocking-script/https://info.centralcsp.com/articles/why-is-csp-blocking-script/A debugging runbook for "Refused to load the script because it violates the following Content Security Policy": read the effective directive, identify the usual suspects, fix with a hash or nonce, and confirm at scale with violation reports.Sun, 09 Aug 2026 00:00:00 GMTcspdebuggingscript-srcviolationsconsole-errors