Stored Cross-Site Scripting Vulnerability in FlatPM Ad Manager Plugin for WordPress
CVE-2026-0690

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Flatpm – Ad Manager, Adsense And Custom Code
Vendor
CVE Published:
20 January 2026

What is CVE-2026-0690?

The FlatPM – Ad Manager, AdSense and Custom Code plugin for WordPress contains a vulnerability that allows authenticated users with contributor-level access and above to exploit the 'rank_math_description' custom field. Due to inadequate input sanitization and output escaping, attackers can inject arbitrary web scripts. These scripts can be executed in the browsers of users who access affected pages, posing significant security risks to the site and its users.

Affected Version(s)

FlatPM – Ad Manager, AdSense and Custom Code 0 <= 3.2.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3434760/flat...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Muhammad Yudha - DJ
.