CVE-2021-23969 — Sensitive Information Exposure in Mozilla Firefox
Severity
4.3MEDIUMNVD
EPSS
0.8%
top 26.61%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedFeb 26
Latest updateJan 6
Description
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…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:NExploitability: 2.8 | Impact: 1.4
Affected Packages8 packages
Also affects: Debian Linux 10.0, 9.0
🔴Vulnerability Details
4GHSA▶
GHSA-hrpc-c9c2-pj6w: 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 r↗2022-05-24
CVEList▶
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 r↗2021-02-26
OSV▶
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 r↗2021-02-26