VulnerabilityPublished 20 Nov 2025

CVE-2025-64185: OSC ondemand · Insecure Inherited Permissions

Affects OSC ondemandSource CVE Database V5

Not known to be exploited · CVSS 6.9 Medium : upgrade to 4.0.8 or 3.1.16 when convenient.

Data as of 26 Oct 2026, 12:55 UTC

CVSS 4.0 base score

6.9Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.0.8, 3.1.16

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 20 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade osc/ondemand to 4.0.8 or 3.1.16.

Affected software

Product	Affected	Fixed in
GitHubosc/ondemand`pkg:github/osc/ondemand`Other threats	Affected <3.1.16 <4.0.8	Fixed in 3.1.16 4.0.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

European organizations should immediately upgrade Open OnDemand installations to versions 4.0.8 or 3.1.16, which contain patches addressing the insecure permission issue. In addition to patching, administrators must audit the GEM_PATH environment variable and all directories it references to ensure no world-writable permissions exist. Implement strict filesystem permission policies that restrict write access to trusted users only. Regularly monitor HPC portal logs and file integrity to detect unauthorized changes. Employ role-based access controls (RBAC) within HPC environments to limit the scope of potential exploitation. Consider isolating HPC portal services in containerized or sandboxed environments to reduce the impact of any compromise. Finally, integrate vulnerability scanning and configuration management tools tailored for HPC systems to proactively identify and remediate insecure permissions or configurations.

Description

Open OnDemand is an open-source HPC portal. Prior to versions 4.0.8 and 3.1.16, Open OnDemand packages create world writable locations in the GEM_PATH. Open OnDemand versions 4.0.8 and 3.1.16 have been patched for this vulnerability.

Impact

For European organizations, particularly those operating HPC clusters in academic, research, and industrial sectors, this vulnerability could lead to unauthorized modification of HPC portal components or injected malicious code. This compromises the integrity of computational jobs, potentially leading to incorrect scientific results or data corruption. The availability of HPC resources could also be indirectly affected if malicious actors exploit this vulnerability to disrupt service or escalate privileges. Given the remote, unauthenticated nature of the exploit, attackers could leverage this flaw to gain footholds in HPC environments, which are often interconnected with sensitive research data and intellectual property. The impact is especially critical for institutions involved in sensitive research fields such as pharmaceuticals, climate modeling, and defense-related simulations. Additionally, the vulnerability could be exploited to propagate malware or ransomware within HPC infrastructures, amplifying operational and reputational damage. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the potential for future attacks.

CWE-277Insecure Inherited Permissions (opens in a new tab)
Variant weakness
A product defines a set of insecure permissions that are inherited by objects that are created by the program.
Architecture and Design · Operation
Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
Architecture and Design · Separation of Privilege
Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-552Files or Directories Accessible to External Parties (opens in a new tab)
Base weaknessOWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product makes files or directories accessible to unauthorized actors, even though they should not be.
Implementation · System Configuration · Operation
When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to disable public access.
OWASP Cheat Sheets
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V12.5.1 (opens in a new tab)
V12.4.1 (opens in a new tab)
V8.3.8 (opens in a new tab)
Attack patterns
Collect Data from Common Resource Locations (opens in a new tab)
Probe System Files (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

github.com/OSC/ondemand/security/advisories/GHSA-r2cg-hg78-gq9p (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Nov 2025, 17:27 UTC

WeaknessesCWE-277, CWE-552

Technical details

References

Community reviews

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