Vulnerability Monitor

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CVE-2025-9181

Uninitialized memory in the JavaScript Engine component. This vulnerability affects Firefox < 142, Firefox ESR < 128.14, Firefox ESR < 140.2, Thunderbird < 142, Thunderbird < 128.14, and Thunderbird < 140.2.

Published

2025-08-19T21:15:30.520

Last Modified

2025-08-21T18:37:31.343

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

Weaknesses

Type: Secondary
CWE-457

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 128.14.0	Yes
Application	mozilla	firefox	< 142.0	Yes
Application	mozilla	firefox	< 140.2.0	Yes
Application	mozilla	thunderbird	< 128.14.0	Yes
Application	mozilla	thunderbird	< 142.0	Yes
Application	mozilla	thunderbird	< 140.2.0	Yes

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1977130 Issue Tracking, Permissions Required ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-64/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-66/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-67/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-70/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-71/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-72/ Vendor Advisory ([email protected])