CVE-2026-0690
Stored XSS in FlatPM Ad Manager Plugin Allows Script Injection
Publication date: 2026-01-20
Last updated on: 2026-01-20
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| unknown_vendor | flatpm-wp | to 3.2.2 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-0690 is a Stored Cross-Site Scripting (XSS) vulnerability in the FlatPM – Ad Manager, AdSense and Custom Code plugin for WordPress. It occurs via the 'rank_math_description' custom field due to insufficient input sanitization and output escaping. Authenticated users with contributor level access or higher can inject malicious scripts into pages, which then execute whenever those pages are viewed by users. [2]
How can this vulnerability impact me? :
This vulnerability can allow attackers with contributor or higher access to inject arbitrary scripts into web pages. These scripts can execute in the context of users visiting the affected pages, potentially leading to theft of user data, session hijacking, defacement, or other malicious actions that compromise the security and integrity of the website and its users. [2]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
Detection of this vulnerability involves checking if the WordPress site is running the flatpm-wp plugin version 3.2.2 or earlier, as these versions are vulnerable. Since the vulnerability is a Stored Cross-Site Scripting via the 'rank_math_description' custom field, you can look for suspicious script tags or JavaScript code injected in this custom field. There are no specific commands provided in the resources, but you can use WordPress CLI commands to check the plugin version, for example: `wp plugin list` to see installed plugin versions. Additionally, inspecting the database entries for the 'rank_math_description' custom field for injected scripts can help detect exploitation. Network detection might involve monitoring HTTP responses for unexpected script content in pages served by the plugin. [2]
What immediate steps should I take to mitigate this vulnerability?
The immediate step to mitigate this vulnerability is to update the flatpm-wp plugin to version 3.2.3 or later, as this version includes a security fix that improves input sanitization and output escaping to prevent the Stored Cross-Site Scripting vulnerability. Applying this update will address the issue by sanitizing the 'rank_math_description' custom field and related metadata properly. Until the update is applied, restrict contributor-level access or higher to trusted users only to reduce the risk of exploitation. [2]