CVE-2025-13529

Unify <= 3.4.9 - Missing Authorization to Unauthenticated Option Deletion via 'unify_plugin_downgrade' Parameter

Published Jan 7, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

The Unify plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'init' action in all versions up to, and including, 3.4.9. This makes it possible for unauthenticated attackers to delete specific plugin options via the 'unify_plugin_downgrade' parameter.

Analysis

Technical impact

The Unify plugin for WordPress fails to enforce a capability check on the init action in all releases up to and including 3.4.9, allowing an unauthenticated user to specify the unify_plugin_downgrade parameter and delete arbitrary plugin options. This missing authorization flaw (CWE‑862) can compromise the configuration and stability of the site, potentially leading to service disruption or defacement.

Affected Systems

This issue affects any WordPress site running the Unify plugin version 3.4.9 or earlier, as distributed by CodeClouds. No other products or versions are listed as impacted.

Risk and Exploitability

The CVSS score of 5.3 indicates moderate severity, and the EPSS score of less than 1% suggests a low likelihood of exploitation in the wild. The vulnerability is not included in CISA KEV. Attackers would need only to reach a public endpoint on the target WordPress installation and craft an HTTP request containing the unify_plugin_downgrade parameter; the absence of user authentication makes the attack vector straightforward but requires the site to be reachable.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

codeclouds

Unify

unaffected

Version	Status	Constraints
`0`	affected	≤ 3.4.9

No data.

Vendor	Product	Versions
Wordpress	Wordpress	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade the Unify plugin to the latest available version, which includes the authorization check.
If an upgrade is not immediately possible, deactivate or uninstall the Unify plugin to eliminate the vulnerability.
Configure a Web Application Firewall or similar rule to block or sanitize any request containing the unify_plugin_downgrade parameter.

Generated by OpenCVE AI on April 21, 2026 at 00:34 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.270% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://plugins.trac.wordpress.org/browser/unify/tags/3.4.9/Services/Hooks.php#L154
https://plugins.trac.wordpress.org/changeset/3447706/
https://www.wordfence.com/threat-intel/vulnerabilities/id/b5fd4a47-0549-4d03-b81a-ad97d3d5d390?source=cve

History

Apr 8, 2026 7:30 PM References updated View changes

Type	Values Removed	Values Added
References	https://plugins.trac.wordpress.org/browser/unify/trunk/Services/Hooks.php#L154

Apr 8, 2026 6:30 PM Added references View changes

Type	Values Removed	Values Added
References		https://plugins.trac.wordpress.org/changeset/3447706/

Jan 8, 2026 10:00 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Wordpress Wordpress wordpress
Vendors & Products		Wordpress Wordpress wordpress

Jan 7, 2026 5:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jan 7, 2026 8:30 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		The Unify plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'init' action in all versions up to, and including, 3.4.9. This makes it possible for unauthenticated attackers to delete specific plugin options via the 'unify_plugin_downgrade' parameter.
Title		Unify <= 3.4.9 - Missing Authorization to Unauthenticated Option Deletion via 'unify_plugin_downgrade' Parameter
Weaknesses		CWE-862
References		https://plugins.trac.wordpress.org/browser/unify/tags/3.4.9/Services/Hooks.php#L154 https://plugins.trac.wordpress.org/browser/unify/trunk/Services/Hooks.php#L154 https://www.wordfence.com/threat-intel/vulnerabilities/id/b5fd4a47-0549-4d03-b81a-ad97d3d5d390?source=cve
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}`