Memory Exposure Vulnerability in Mozilla Firefox Browser
CVE-2025-1942

6.5MEDIUM

Key Information:

Vendor
Mozilla
Status
Firefox
Vendor
CVE Published:
4 March 2025

Summary

This vulnerability arises in Mozilla Firefox due to improper handling of string operations. Specifically, when the String.toUpperCase() method is applied to a string that unexpectedly increases in length, it can inadvertently incorporate uninitialized memory into the resulting string. This flaw poses potential risks as sensitive information may be leaked, posing privacy concerns for users. It is recommended to update to the latest version of Firefox to mitigate the effects of this vulnerability.

Affected Version(s)

Firefox < 136

References

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

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

anbu
.