File Content Disclosure Vulnerability in Mozilla Firefox
CVE-2025-1936

7.3HIGH

Key Information:

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

Summary

This vulnerability in Mozilla Firefox allows attackers to retrieve local file content from ZIP archives. By manipulating URLs with jar: protocols, it exploits how null characters and extensions are processed, enabling harmful code to be disguised as legitimate content such as images. This poses a risk, as the exploited web extensions can potentially reveal sensitive information or execute unauthorized scripts.

Affected Version(s)

Firefox < 136

Firefox ESR < 128.8

Thunderbird < 136

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1940027
https://www.mozilla.org/security/advisories/mfsa2025-14/
https://www.mozilla.org/security/advisories/mfsa2025-16/

CVSS V3.1

Score:
7.3
Severity:
HIGH
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

Surya Dev Singh
.