CVE-2025-1014highCWE-295

CVE-2025-1014: high-severity vulnerability in Mozilla Firefox

Certificate length was not properly checked

Published 04 Feb 2025 · Updated 13 Apr 2026

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.8epss 0.4%

Certificate length was not properly checked when added to a certificate store. In practice only trusted data was processed. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Mozilla · Firefox Mozilla · Thunderbird

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=1940804 https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html https://www.mozilla.org/security/advisories/mfsa2025-07/https://www.mozilla.org/security/advisories/mfsa2025-09/https://www.mozilla.org/security/advisories/mfsa2025-10/https://www.mozilla.org/security/advisories/mfsa2025-11/