CVE-2025-2817: Path Traversal
First published: Tue Apr 29 2025(Updated: )
Mozilla Firefox'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.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Firefox | <138 | 138 |
| Firefox ESR | <115.23 | 115.23 |
| Mozilla Thunderbird | <128.10 | 128.10 |
| Firefox ESR | <128.10 | 128.10 |
| Thunderbird | <138 | 138 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1917536
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-28/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-30/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-32/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-29/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-31/
- 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/
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2025-2817?
CVE-2025-2817 is classified as a medium severity vulnerability.
How do I fix CVE-2025-2817?
To fix CVE-2025-2817, update your Mozilla Firefox to version 138 or higher, or to Firefox ESR version 115.23 or higher.
What products are affected by CVE-2025-2817?
CVE-2025-2817 affects Mozilla Firefox, Firefox ESR, and Thunderbird versions prior to the specified updates.
What is the nature of the flaw in CVE-2025-2817?
The flaw in CVE-2025-2817 involves a vulnerable update mechanism that allows a medium-integrity user process to interfere with the SYSTEM-level updater.
Can CVE-2025-2817 allow unauthorized file operations?
Yes, CVE-2025-2817 can allow attackers to bypass access controls and perform SYSTEM-level file operations.
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