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Medium severity5.4NVD Advisory· Published Sep 16, 2025· Updated Apr 13, 2026

CVE-2025-10531

CVE-2025-10531

Description

Mitigation bypass in the Web Compatibility: Tooling component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

5

Mozilla Corporation/Firefox2 versions
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <143.0
- (no CPE)range: <143
Mozilla Corporation/Thunderbird2 versions
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <143.0
- (no CPE)range: <143
osv-coords
pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweed
Range: < 143.0-1.1

Patches

Vulnerability mechanics

References

3

www.mozilla.org/security/advisories/mfsa2025-73/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2025-77/nvdVendor Advisory
bugzilla.mozilla.org/show_bug.cginvdPermissions Required

News mentions

0

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