CVE-2025-1942

critical · 9.8

When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string. This vulnerability was fixed in Firefox 136 and Thunderbird 136.

9.8

CVSS

0.5%

EPSS (exploit prob.)

40th

EPSS percentile

2025-03-04

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-908

Affected products

Vendor	Product	Affected versions
mozilla	firefox	< 136.0
mozilla	thunderbird	< 136.0

Check a specific version with /api/v1/cve/match.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1947139
https://www.mozilla.org/security/advisories/mfsa2025-14/
https://www.mozilla.org/security/advisories/mfsa2025-17/

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2025-1942