CVE-2025-1937

moderate-risk
Published 2025-03-04

Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

Do I need to act?

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0.21% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / HIGH complexity

Affected Products (3)

Affected Vendors

Mozilla

References (8)

Exploit https://bugzilla.mozilla.org/buglist.cgi?bug_id=1938471%2C1940716
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-14/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-15/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-16/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-17/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-18/
Vendor Advisory http://www.openwall.com/lists/oss-security/2025/03/10/6
https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html
32
/ 100
moderate-risk
Severity 22/34 · High
Exploitability 1/34 · Minimal
Exposure 9/34 · Low