CVE-2025-4090

MEDIUM 5.3CVE-2025-4090 · Published 29/04/2025 · updated 30/09/2026

In short

CVE-2025-4090 is a MEDIUM (CVSS 5.3) vulnerability affecting firefox (mozilla), thunderbird (mozilla).
Chance of exploitation in the next 30 days (EPSS): 0.33%, higher than 26.6% of all vulnerabilities.
Fix: update to 138.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 138.0`	`138.0`
thunderbird mozilla	`< 138.0`	`138.0`

Description

A vulnerability existed in Thunderbird for Android where potentially sensitive library locations were logged via Logcat. This vulnerability was fixed in Firefox 138 and Thunderbird 138.

References

bugzilla.mozilla.org/show_bug.cgi · Permissions Required
mozilla.org/security/advisories/mfsa2025-28 · Vendor Advisory
mozilla.org/security/advisories/mfsa2025-31 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

< 138.0

138.0

thunderbird

mozilla

< 138.0

138.0

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