Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-23969

As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.012
EPSS Ranking 77.6%
CVSS Severity
CVSS v3 Score 4.3
CVSS v2 Score 4.3
References
Products affected by CVE-2021-23969


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