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Incorrect Privilege AssignmentWeakness · CWE-266

CVE-2025-55707

HIGH · 7.2 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 →
78/100
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
Incorrect Privilege Assignment vulnerability in WPXPO PostX ultimate-post allows Privilege Escalation.This issue affects PostX: from n/a through <= 4.1.35.

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

The PostX WordPress plugin versions through 4.1.35 contains an incorrect privilege assignment vulnerability that allows authenticated users to escalate their privileges beyond what they should normally have access to.

MitigationUpdate PostX plugin to the latest version immediately; if updates are unavailable, review user roles and permissions, and consider disabling the plugin until a patch is released.

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
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

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. Verify PostX plugin is installed
    In WordPress admin, go to Plugins > Installed Plugins and look for 'PostX' or 'PostX - Gutenberg Post Listing Grid' in the list. Alternatively, check the /wp-content/plugins/ directory for a postx folder.
    Affected if PostX plugin is present in the WordPress installation
  2. Determine installed PostX version
    In WordPress admin, go to Plugins > Installed Plugins, find PostX, and note the version number displayed below the plugin name. Or check the main plugin file header in /wp-content/plugins/postx/includes/gbp-postx-plugin.php for the 'Version' comment.
    Affected if Version is 4.1.35 or lower
  3. Confirm user authentication settings
    Review WordPress user roles and confirm that the site allows user registration or has existing user accounts (not just administrator accounts). Check if any non-administrator users have access to the site.
    Affected if The site has authenticated users with roles other than administrator who could potentially exploit the privilege escalation
  4. Check if PostX functionality is active
    Review whether PostX shortcodes or blocks are in use on the site, or if the plugin settings have been configured. Check /wp-content/plugins/postx/ for recent activity timestamps.
    Affected if The plugin is actively configured or used on the site, creating potential for authenticated users to trigger the privilege escalation

The environment is affected if the PostX plugin is installed with version 4.1.35 or lower and the site has authenticated non-administrator users who could exploit the incorrect privilege assignment.

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 plugin to the latest version immediately; if updates are unavailable, review user roles and permissions, and consider disabling the plugin until a patch is released.

Recommended fix Moderate confidence

Latest version of PostX (any version > 4.1.35)

  1. 1. Log in to the WordPress admin dashboard
  2. 2. Navigate to Plugins > Installed Plugins
  3. 3. Locate the PostX plugin (also called "ultimate-post" or "PostX - Ultimate Post Grid & List")
  4. 4. If an update is available, click "Update Now" to install the latest version
  5. 5. If no update shows, manually download the latest version from wordpress.org/plugins/postx/ and upload via Plugins > Add New > Upload Plugin
  6. 6. After updating, verify the plugin is active and the site functions normally

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

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,060
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.

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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-2025-55707 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
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