CVE-2025-53636 Open OnDemand Shell App closed websocket DoS
Attackers can cause a Denial of Service in Open OnDemand by flooding logs through the shell app, requiring an upgrade to mitigate.
- 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-2025-53636?
CVE-2025-53636 is a medium-severity denial of service vulnerability in OSC ondemand, published on 11 Jul 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. Users can flood logs by interacting with the shell app and generating many errors. Users who flood logs can create very large log files causing a Denial of Service (DoS) to the ondemand system. This vulnerability is fixed in 3.1.14 and 4.0.6.
Which versions are affected by CVE-2025-53636?
How do I fix CVE-2025-53636?
No fix has been published for CVE-2025-53636 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-53636 being exploited?
There is no known exploitation of CVE-2025-53636 in the wild and no public exploit code.
Sources
Also known as GHSA-x5xv-fw37-v524.