Unauthenticated Disclosure of PSU HAX CMS Site Listings via haxPsuUsage API Endpoint

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

• CVE-2025-48996: 0.37% estimated exploitation activity in the next 30 days; percentile 31.25 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary An unauthenticated information disclosure vulnerability exists in the PSU deployment of HAX CMS via the haxPsuUsage API endpoint. This allows any remote unauthenticated user to retrieve a full list of PSU websites hosted on HAX CMS. When chained with other authorization issues (e.g., HAX-3), this could assist in targeted attacks such as unauthorized content modification or deletion. --- Details The endpoint https://open-apis.hax.cloud/api/services/stats/haxPsuUsage returns a list of websites on the PSU instance of HAX CMS. This endpoint is exposed without any authentication or authorization checks. The source of the issue is in the haxPsuUsage.js file, which appears to directly serve the site listing without verifying user identity or access level. This enables anyone with the endpoint URL to enumerate all site instances under the PSU deployment. This endpoint may have originally been used for internal or statistical purposes but is now publicly accessible, representing a…

Published by the source

5 Jun 2025, 01:07 UTC

Last modified by the source

5 Jun 2025, 01:07 UTC

Source last checked

26 Oct 2026, 12:37 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-fvx2-x7ff-fc56

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-fvx2-x7ff-fc56

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# Patch Next advisory brief: CVE-2025-48996

Advisory: Unauthenticated Disclosure of PSU HAX CMS Site Listings via haxPsuUsage API Endpoint
IDs: CVE-2025-48996, GHSA-fvx2-x7ff-fc56
Record: https://patchnext.com/advisories/cve-2025-48996 (revision 2, source checked 26 Oct 2026, 12:37 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @haxtheweb/open-apis: affected <= 10.0.1

## Suggested inspection (read-only)
- `npm ls @haxtheweb/open-apis --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @haxtheweb/open-apis.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-fvx2-x7ff-fc56 (OSV record GHSA-fvx2-x7ff-fc56 lists affected ranges: npm @haxtheweb/open-apis >=0 <=10.0.1)
- Verified: https://github.com/advisories/GHSA-fvx2-x7ff-fc56 (GitHub-reviewed advisory GHSA-fvx2-x7ff-fc56 lists affected ranges: npm @haxtheweb/open-apis >=0 <=10.0.1)

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