CVE-2025-8037 describes a critical vulnerability in Mozilla Firefox and Thunderbird versions prior to 141 and 140.1, respectively, where a nameless cookie containing an equals sign in its value could shadow other cookies, even secure ones. This vulnerability carries a CVSS score of 9.1 (CRITICAL), indicating it can be exploited remotely with low complexity to achieve high confidentiality and integrity impacts without user interaction. While there is no evidence of active exploitation, public exploit code, or inclusion in CISA's KEV catalog, the vulnerability has garnered some community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 140.1CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* | ||
< 141.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* | ||
< 140.1CPE matchmatch criteria | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:* | ||
< 141.0CPE matchmatch criteria | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.