CVE-2025-62724— Open OnDemand allowlist bypass using symlinks in directory downloads (TOCTOU)
Quick assessment
Affected
OSC ondemand
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Open OnDemand是Ohio Supercomputer Center开源的一个通过Web实现开放式交互式HPC的软件。 Open OnDemand 4.0.8之前版本和3.1.16之前版本存在安全漏洞，该漏洞源于TOCTOU攻击，可能导致访问OOD_ALLOWLIST之外的文件。
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I. Basic Information for CVE-2025-62724
Vulnerability Information
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Vulnerability Title
Open OnDemand allowlist bypass using symlinks in directory downloads (TOCTOU)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-61
Source: CVE Program / CVE List V5
Vulnerability Title
Open OnDemand 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open OnDemand是Ohio Supercomputer Center开源的一个通过Web实现开放式交互式HPC的软件。 Open OnDemand 4.0.8之前版本和3.1.16之前版本存在安全漏洞，该漏洞源于TOCTOU攻击，可能导致访问OOD_ALLOWLIST之外的文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-62724
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V. Comments for CVE-2025-62724
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