Arbitrary Code Injection Affecting Firefox-ESR package, versions [,128.8)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UNMANAGED-FIREFOXESR-9376938
- published10 Mar 2025
- disclosed4 Mar 2025
- creditSurya Dev Singh
Introduced: 4 Mar 2025
CVE-2025-1936 (opens in a new tab)How to fix?
Upgrade Firefox-ESR to version 128.8 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection due to improper handling of null bytes %00 in jar: URLs. An attacker can append %00 followed by a fake file extension to a jar: URL, causing the system to ignore the null byte when retrieving the file content but use the fake extension to determine the file type