What’s Vulnerable › Vulnerabilities

CVE-2025-53636: Open OnDemand Shell App closed websocket DoS

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-11 · updated 2026-06-17
• Weakness: CWE-400

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.

Affected products

• OSC ondemand: from 1.6, < 3.1.14; from 4.0.0-0.rc1, < 4.0.6

References

• https://github.com/OSC/ondemand/commit/40800d68cd019c5f1c48b2deafebba6dff4abee2
• https://github.com/OSC/ondemand/commit/96f29b995e1add7562516614e4dc8d961987e8b4
• https://github.com/OSC/ondemand/security/advisories/GHSA-x5xv-fw37-v524

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