vulnerability
MFSA2025-23 Thunderbird: Security Vulnerabilities fixed in Thunderbird 137 (CVE-2025-3033)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:N/C:C/I:C/A:N) | Apr 1, 2025 | Apr 2, 2025 | Apr 15, 2026 |
Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:N)
Published
Apr 1, 2025
Added
Apr 2, 2025
Modified
Apr 15, 2026
Description
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.
Solution
mozilla-thunderbird-upgrade-137_0
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.