CVE-2025-1014: firefox Cert Validation Flaw — Fix

Description

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.

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CVSS v3.1 Score

8.8

HIGH

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

Weakness Type (CWE)

CWE-295 CWE-295

Affected Products

Vendor	Product	Versions
mozilla	firefox	< 128.7.0
mozilla	firefox	< 135.0
mozilla	thunderbird	128.0.1 — 128.7.0
mozilla	thunderbird	131.0 — 135.0

References

Advisories & Patches

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/

Other References

https://bugzilla.mozilla.org/show_bug.cgi?id=1940804 https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html

Frequently Asked Questions

What is CVE-2025-1014? +

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. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-1014? +

CVE-2025-1014 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-1014? +

CVE-2025-1014 affects products from mozilla, specifically: firefox, thunderbird. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-1014? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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