Memory Safety Vulnerabilities in Firefox and Thunderbird by Mozilla
CVE-2025-1938

6.5MEDIUM

Key Information:

Vendor
Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
4 March 2025

Summary

Mozilla has identified memory safety bugs affecting specific versions of Firefox and Thunderbird that may allow for memory corruption. These vulnerabilities could potentially be exploited to execute arbitrary code. Users are advised to update to the latest versions, Firefox 136 and Thunderbird 136, or their respective ESR versions, to mitigate any risks associated with these vulnerabilities.

Affected Version(s)

Firefox < 136

Firefox ESR < 128.8

Thunderbird < 136

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1922889%2...
https://www.mozilla.org/security/advisories/mfsa2025-14/
https://www.mozilla.org/security/advisories/mfsa2025-16/

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

  • Vulnerability Reserved

Credit

Julien Wajsberg, the Mozilla Fuzzing Team
.