CVE-2025-2817
Thunderbird's update mechanism allowed a medium-integrity user process to interfere with the SYSTEM-level updater by manipulating the file-locking behavior. By injecting code into the user-privileged process, an attacker could bypass intended access controls, allowing SYSTEM-level file operations on paths controlled by a non-privileged user and enabling privilege escalation. This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Firefox ESR < 115.23, Thunderbird < 138, and Thunderbird < 128.10.
| Software | From | Fixed in |
|---|---|---|
| mozilla / firefox | - | 138.0 |
| mozilla / thunderbird | - | 128.10.0 |
| mozilla / firefox | - | 115.23.0 |
| mozilla / firefox | 116.0 | 128.10.0 |
| mozilla / thunderbird | 129.0 | 138.0 |
- https://bugzilla.mozilla.org/show_bug.cgi?id=1917536
- https://lists.debian.org/debian-lts-announce/2025/05/msg00022.html
- https://www.mozilla.org/security/advisories/mfsa2025-28/
- https://www.mozilla.org/security/advisories/mfsa2025-29/
- https://www.mozilla.org/security/advisories/mfsa2025-30/
- https://www.mozilla.org/security/advisories/mfsa2025-31/
- https://www.mozilla.org/security/advisories/mfsa2025-32/
Deep Security Visibility Without the Complexity
SynScan provides clear, real-time security insights so you can monitor your attack surface, spot risks early, and act fast—without extra complexity.
- No setup fees
- 5-min deployment
- Cancel anytime