CVE-2025-55707

PostX <= 4.1.35 - Authenticated (Editor+) Privilege Escalation

2025-08-29 00:00

Strategic Overview

Status: Patched in 4.1.36
Affected Plugin: Post Grid Gutenberg Blocks – PostX
Affected Version: <= 4.1.35
CVSS: 7.2High
Weakness type: CWE-269 · Improper Privilege Management
CVE: CVE-2025-55707

View all Post Grid Gutenberg Blocks – PostX vulnerabilities

At a glance

CVE-2025-55707 is a high-severity Improper Privilege Management vulnerability in the Post Grid Gutenberg Blocks WordPress plugin, affecting versions <= 4.1.35. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Editor level or above. The issue is fixed in version 4.1.36; sites on affected versions should update now. Disclosed August 2025, reported by Denver Jackson.

Vulnerability Overview

The Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.1.35. This makes it possible for authenticated attackers, with Editor-level access and above, to elevate their privileges.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-269: Improper Privilege Management

Reaching this weakness in Post Grid Gutenberg Blocks <= 4.1.35 takes an account at Editor level or above. Improper privilege management means the code lets an account end up with capabilities its role should not have.

It converts a low-privileged account into an administrative one, which makes every other restriction on the site irrelevant. For Post Grid Gutenberg Blocks the fix is 4.1.36: builds <= 4.1.35 are affected, anything from 4.1.36 onward is not.

Remediation

Update to version 4.1.36, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Post Grid Gutenberg Blocks 4.1.36 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2025-55707 https://www.wordfence.com/threat-intel/vulnerabilities/id/08ad76c6-8e63-4015-b0d9-5699f24f36ca https://nvd.nist.gov/vuln/detail/CVE-2025-55707

Related records

CVSS Vector

7.2

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

This record contains material that is subject to copyright

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/