Astra Linux – Vulnerability in Firefox and Thunderbird

Security policy violation events could have revealed cross-origin information due to violations of frame-ancestor rules. This vulnerability affects Firefox ESR versions earlier than 91.5, Firefox versions earlier than 96, and Thunderbird versions earlier than 91.5...

Mozilla: Leaking cross-origin URLs through securitypolicyviolation event

A flaw was found in Mozilla. The Mozilla Foundation Security Advisory describes this flaw as: Securitypolicyviolation events could have leaked cross-origin information for frame-ancestors violations...