dbcve.org
Missing AuthorizationWeakness · CWE-862

CVE-2025-54751

HIGH · 7.1 CVSS v3.1 Published 2025-12-18
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
77/100
Remediation priority · High
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Missing Authorization vulnerability in WPXPO PostX ultimate-post allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects PostX: from n/a through <= 4.1.36.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Missing Authorization vulnerability in PostX plugin <= 4.1.36 allows attackers to exploit incorrectly configured access control security levels. This likely enables unauthenticated or low-privilege users to access sensitive functionality that should require proper authorization checks.

MitigationUpdate PostX to the latest version immediately. Audit all admin/action endpoints to ensure proper capability checks and nonce verification are in place for all user operations.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify PostX installation and version
    In WordPress admin, go to Plugins > Installed Plugins and locate PostX. Note the version number displayed. Alternatively, check the plugin header in wp-content/plugins/ultimate-post/views/ or similar plugin directory using a file manager or FTP.
    Affected if PostX is installed and version is 4.1.36 or lower
  2. Review user roles and capabilities
    Navigate to Users > All Users in WordPress admin. Review the role assignments for each user. Check if users with Subscriber, Contributor, or other low-privilege roles have been granted capabilities typically reserved for Administrators or Editors.
    Affected if Low-privilege users (Subscriber, Contributor) possess admin-level capabilities or can access admin-only areas
  3. Inspect admin/action endpoints accessible to unauthenticated users
    Use a tool like WPScan, Burp Suite, or manual curl requests to probe PostX-related endpoints such as /wp-admin/admin-ajax.php?action= or custom PostX REST API routes. Attempt to access these without authentication or with a low-privilege user session.
    Affected if Sensitive admin actions or data are reachable without proper authentication or capability verification
  4. Check for exposed sensitive functionality
    Review PostX plugin settings under the PostX menu in the WordPress admin. Look for features related to content display, template management, or data export that may be accessible based on the access control misconfiguration described.
    Affected if Any sensitive PostX functionality (template editing, content import/export, settings modification) is accessible to users lacking administrative privileges

A user is affected if PostX version 4.1.36 or lower is installed AND low-privilege or unauthenticated users can access admin-level functionality or sensitive endpoints that should require proper authorization.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update PostX to the latest version immediately. Audit all admin/action endpoints to ensure proper capability checks and nonce verification are in place for all user operations.

Recommended fix Moderate confidence

PostX version 4.1.37 or latest available version

  1. Check current PostX plugin version in WordPress admin under Plugins > Installed Plugins
  2. Navigate to Dashboard > Updates or Plugins > Add New > Upload Plugin
  3. Update PostX plugin to the latest available version from the official WordPress repository
  4. Verify the update was successful and the new version is active
  5. Test critical functionality on the site to ensure the update did not break existing features
Caveat Review plugin changelog for any breaking changes between your current version and the new version before updating

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-54751 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data