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CVE-2025-66029

Open OnDemand affected by Apache proxy passing sensitive headers

7.6 High

Open OnDemand provides remote web access to supercomputers. In versions 4.0.8 and prior, the Apache proxy allows sensitive headers to be passed to origin servers. This means malicious users can create an origin server on a compute node that record these headers when unsuspecting users connect to it. Maintainers anticipate a patch in a 4.1 release. Workarounds exist for 4.0.x versions. Using custom_location_directives in ood_portal.yml in version 4.0.x (not available for versions below 4.0) centers can unset and or edit these headers. Note that OIDCPassClaimsAs both is the default and centers can set OIDCPassClaimsAs to none or environment to stop passing these headers to the client. Centers that have an OIDC provider with the OIDCPassClaimsAs with none or environment settings can adjust the settings using guidance provided in GHSA-2cwp-8g29-9q32 to unset the mod_auth_openidc_session cookies.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
Low
Availability
None

Exploit likelihood

0.20%Up 0.2 points since Dec 18, 2025
90%50%10%1%

What each source reports

CVE List Score used 7.6

Open OnDemand affected by Apache proxy passing sensitive headers

Open OnDemand provides remote web access to supercomputers. In versions 4.0.8 and prior, the Apache proxy allows sensitive headers to be passed to origin servers. This means malicious users can create an origin server on a compute node that record these headers when unsuspecting users connect to it. Maintainers anticipate a patch in a 4.1 release. Workarounds exist for 4.0.x versions. Using custom_location_directives in ood_portal.yml in version 4.0.x (not available for versions below 4.0) centers can unset and or edit these headers. Note that OIDCPassClaimsAs both is the default and centers can set OIDCPassClaimsAs to none or environment to stop passing these headers to the client. Centers that have an OIDC provider with the OIDCPassClaimsAs with none or environment settings can adjust the settings using guidance provided in GHSA-2cwp-8g29-9q32 to unset the mod_auth_openidc_session cookies.

Record
CVE-2025-66029
CVSS 3.1
7.6 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Weakness
CWE-522, CWE-523
Updated
2026-11-02
EUVDEUVD-2025-204011 7.6

Open OnDemand provides remote web access to supercomputers. In versions 4.0.8 and prior, the Apache proxy allows sensitive headers to be passed to origin servers. This means malicious users can create an origin server on a compute node that record these headers when unsuspecting users connect to it. Maintainers anticipate a patch in a 4.1 release. Workarounds exist for 4.0.x versions. Using custom_location_directives in ood_portal.yml in version 4.0.x (not available for versions below 4.0) centers can unset and or edit these headers. Note that OIDCPassClaimsAs both is the default and centers can set OIDCPassClaimsAs to none or environment to stop passing these headers to the client. Centers that have an OIDC provider with the OIDCPassClaimsAs with none or environment settings can adjust the settings using guidance provided in GHSA-2cwp-8g29-9q32 to unset the mod_auth_openidc_session cookies.

Record
EUVD-2025-204011
CVSS 3.1
7.6 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Updated
2026-11-02
NVD 7.6

Open OnDemand provides remote web access to supercomputers. In versions 4.0.8 and prior, the Apache proxy allows sensitive headers to be passed to origin servers. This means malicious users can create an origin server on a compute node that record these headers when unsuspecting users connect to it. Maintainers anticipate a patch in a 4.1 release. Workarounds exist for 4.0.x versions. Using custom_location_directives in ood_portal.yml in version 4.0.x (not available for versions below 4.0) centers can unset and or edit these headers. Note that OIDCPassClaimsAs both is the default and centers can set OIDCPassClaimsAs to none or environment to stop passing these headers to the client. Centers that have an OIDC provider with the OIDCPassClaimsAs with none or environment settings can adjust the settings using guidance provided in GHSA-2cwp-8g29-9q32 to unset the mod_auth_openidc_session cookies.

Record
CVE-2025-66029
CVSS 3.1
7.6 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Weakness
CWE-522, CWE-523
Updated
2026-11-02
OSV 7.6

Open OnDemand affected by Apache proxy passing sensitive headers

Open OnDemand provides remote web access to supercomputers. In versions 4.0.8 and prior, the Apache proxy allows sensitive headers to be passed to origin servers. This means malicious users can create an origin server on a compute node that record these headers when unsuspecting users connect to it. Maintainers anticipate a patch in a 4.1 release. Workarounds exist for 4.0.x versions. Using custom_location_directives in ood_portal.yml in version 4.0.x (not available for versions below 4.0) centers can unset and or edit these headers. Note that OIDCPassClaimsAs both is the default and centers can set OIDCPassClaimsAs to none or environment to stop passing these headers to the client. Centers that have an OIDC provider with the OIDCPassClaimsAs with none or environment settings can adjust the settings using guidance provided in GHSA-2cwp-8g29-9q32 to unset the mod_auth_openidc_session cookies.

Record
CVE-2025-66029
CVSS 3.1
7.6 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Weakness
CWE-522, CWE-523
Updated
2026-11-02

Affected products

History

History
RecordedChangedSources
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-66029 is a high vulnerability (CVSS 7.6) in Osc Ondemand, published December 17, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. No source names a fixed version.

References

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