Authentication Bypass by Spoofing Affecting thunderbird package, versions [,128.10.1)[130.0b1,138.0.1)
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-THUNDERBIRD-10231817
- published23 May 2025
- disclosed14 May 2025
- creditDario Weißer
Introduced: 14 May 2025
NewCVE-2025-3909 (opens in a new tab)How to fix?
Upgrade thunderbird to version 128.10.1, 138.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Authentication Bypass by Spoofing via nested email attachment. An attacker can execute arbitrary JavaScript code by embedding it into malicious attachment and setting its content type to application/pdf.