CVE-2025-62724 Open OnDemand allowlist bypass using symlinks in directory downloads (TOCTOU)
Attackers can bypass file allowlists via symlink TOCTOU race conditions to read unauthorized files in Open OnDemand HPC portals.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-62724?
CVE-2025-62724 is a medium-severity path traversal vulnerability in OSC ondemand, published on 20 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Open OnDemand is an open-source HPC portal. Prior to versions 4.0.8 and 3.1.16, users can craft a "Time of Check to Time of Use" (TOCTOU) attack when downloading zip files to access files outside of the OOD_ALLOWLIST. This vulnerability impacts sites that use the file browser allowlists in all current versions of OOD. However, files accessed are still protected by the UNIX permissions. Open OnDemand versions 4.0.8 and 3.1.16 have been patched for this vulnerability.
Which versions are affected by CVE-2025-62724?
How do I fix CVE-2025-62724?
No fix has been published for CVE-2025-62724 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-62724 being exploited?
There is no known exploitation of CVE-2025-62724 in the wild and no public exploit code.
Sources
Also known as GHSA-vjpg-34px-gjrw.