CVE-2025-54834Network attack vector

Unauthenticated username enumeration via response discrepancies

Published Jul 31, 2025 · Updated Jul 31, 2025

Username enumeration in OPEXUS FOIAXpress Public Access Link 11.1.0 allows remote attackers to identify valid accounts without authentication. The /App/CreateRequest.aspx endpoint returns observably different responses for existing and nonexistent usernames and imposes no request rate limit. Internet or intranet access to PAL is sufficient, and the disclosure supports targeted password attacks against confirmed accounts.

CVSS severity6.9
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Username enumeration in OPEXUS FOIAXpress Public Access Link 11.1.0 allows remote attackers to identify valid accounts without authentication. The /App/CreateRequest.aspx endpoint returns observably different responses for existing and nonexistent usernames and imposes no request rate limit. Internet or intranet access to PAL is sufficient, and the disclosure supports targeted password attacks against confirmed accounts.

The record

CVE
CVE-2025-54834
Published
Jul 31, 2025
Updated
Jul 31, 2025
Vendor
OPEXUS
Product
FOIAXpress Public Access Link
Classifications
CWE-204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.1.0 <11.12.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OPEXUS · FOIAXpress Public Access Linkversion=11.1.0 <11.12.3.0

Published CVSS scores

6.9CISACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
5.3CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-204Observable Response Discrepancy

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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