Memory Safety Bugs in Firefox and Thunderbird Affecting Mozilla Products
CVE-2025-0242

6.5MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
7 January 2025

What is CVE-2025-0242?

Multiple memory safety vulnerabilities have been identified in Mozilla Firefox and Thunderbird, specifically in versions 133 and earlier. These vulnerabilities can lead to memory corruption, and while exploitation of these bugs is not guaranteed, they possess the potential to allow attackers to execute arbitrary code if successfully manipulated. The affected versions include Firefox and Thunderbird prior to version 134, as well as specific extended support releases (ESR) prior to versions 115.19 and 128.6. Users and administrators are recommended to upgrade to the latest versions to mitigate these risks.

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Affected Version(s)

Firefox < 134

Firefox ESR < 128.6

Firefox ESR < 115.19

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1874523%2...
https://www.mozilla.org/security/advisories/mfsa2025-01/
https://www.mozilla.org/security/advisories/mfsa2025-02/

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

Credit

Andrew McCreight, Tooru Fujisawa, and the Mozilla Fuzzing Team
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