Anti-Spam by CleanTalk <= 6.90 - Authenticated (Contributor+) Stored Cross-Site Scripting via Force Protection Form Wrapper
- ID
- WPSEC-2026-2025
- Plugin
- Anti-Spam, Spam FireWall by CleanTalk (cleantalk-spam-protect)
- Affected
- from 6.48 before 6.91
- Remediation
- Update to 6.91 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness
- CWE-79
- Usage
- Plugin High · Affected versions High among sites WPSec scans, 2026-10-30
- Attack surface
- Anti-Spam by CleanTalk on WPSec AttackSurface
- Fix released
- Published
Description
The Anti-Spam, Spam FireWall by CleanTalk plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Force Protection form wrapper in all versions up to, and including, 6.90, due to the front-end script decoding every 'ct-encoded-form-wrapper' element on the page and writing its base64 'data-encoded-form' value into outerHTML, without checking that the plugin created the wrapper. This makes it possible for authenticated attackers with Contributor-level access and above to place a wrapper in post content that runs arbitrary web scripts in a visitor's browser when the Force Protection setting is enabled.
References
- https://wpsec.com/vuln/WPSEC-2026-2025/
- https://plugins.svn.wordpress.org/cleantalk-spam-protect/tags/6.91/
- https://wordpress.org/plugins/cleantalk-spam-protect/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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