Unsafe Dependency Resolution Affecting Firefox package, versions [,139)
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-FIREFOX-10300822
- published4 Jun 2025
- disclosed27 May 2025
- creditJakub Szymsza
Introduced: 27 May 2025
CVE-2025-5266 (opens in a new tab)How to fix?
Upgrade Firefox to version 139 or higher.
Overview
Affected versions of this package are vulnerable to Unsafe Dependency Resolution due to the handling of script elements loading cross-origin resources. An attacker can leak sensitive information by exploiting the generated load and error events.