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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2021-02-26T01:57:45

Updated: 2024-08-03T19:14:09.977Z

Reserved: 2021-01-13T00:00:00

Link: CVE-2021-23969

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-02-26T02:15:12.947

Modified: 2022-05-27T18:17:00.417

Link: CVE-2021-23969

cve-icon Redhat

Severity : Important

Publid Date: 2021-02-23T00:00:00Z

Links: CVE-2021-23969 - Bugzilla