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CVE-2025-1937: 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...

Description

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 affects Firefox < 136, Firefox ESR < 115.21, and Firefox ESR < 128.8.

Classification

CVE ID: CVE-2025-1937

Problem Types

Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8

Affected Products

Vendor: Mozilla, Mozilla, Mozilla

Product: Firefox, Firefox ESR, Firefox ESR

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.1% (probability of being exploited)

EPSS Percentile: 24.84% (scored less or equal to compared to others)

EPSS Date: 2025-04-02 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-1937
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1938471%2C1940716
https://www.mozilla.org/security/advisories/mfsa2025-14/
https://www.mozilla.org/security/advisories/mfsa2025-15/
https://www.mozilla.org/security/advisories/mfsa2025-16/

Timeline