User Cookie Manipulation Issue in Firefox and Thunderbird Software
CVE-2025-8037
Currently unrated
What is CVE-2025-8037?
A vulnerability exists in Firefox and Thunderbird that allows an unnamed cookie with an equals sign in its value to shadow other cookies. This can occur even if the shadowed cookies have the 'Secure' attribute set, raising concerns regarding the effectiveness of security measures. This flaw can be exploited in various scenarios, potentially compromising user privacy and data integrity across affected versions of the software.
Affected Version(s)
Firefox < 141
Firefox ESR < 140.1
Thunderbird < 141