CVE-2025-54834: OPEXUS FOIAXpress Public Access Link (PAL) unauthenticated username enumeration

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-31 · updated 2026-06-17
Weakness: CWE-204

Description

OPEXUS FOIAXpress Public Access Link (PAL) version v11.1.0 allows an unauthenticated, remote attacker to query the /App/CreateRequest.aspx endpoint to check for the existence of valid usernames. There are no rate-limiting mechanisms in place.

Affected products

OPEXUS FOIAXpress Public Access Link (PAL): from 11.1.0 before 11.12.3.0 — fixed in 11.12.3.0

How to fix

Upgrade to a fixed version: OPEXUS FOIAXpress Public Access Link (PAL) 11.12.3.0. Check the vendor advisory for mitigations.

References

https://docs.opexustech.com/docs/foiaxpress/11.12.0/FOIAXpress_Release_notes_11.12.3.0.pdf
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-174-01.json
https://www.cve.org/CVERecord?id=CVE-2025-54834

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