CVE-2025-3033 Affecting firefox package, versions <137-r0
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.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-FIREFOX-17764039
- published1 Jul 2026
- disclosed1 Apr 2025
Introduced: 1 Apr 2025
CVE-2025-3033 (opens in a new tab)How to fix?
Upgrade Chainguard firefox to version 137-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
After selecting a malicious Windows .url shortcut from the local filesystem, an unexpected file could be uploaded.
This bug only affects Firefox on Windows. Other operating systems are unaffected.. This vulnerability was fixed in Firefox 137 and Thunderbird 137.