[IT-SecNots] [Security-news] Anti-Spam by CleanTalk - Moderately critical - Cross site scripting - SA-CONTRIB-2026-042

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-042

Project: Anti-Spam by CleanTalk [1]
Date: 2026-June-03
Security risk: *Moderately critical* 10 ∕ 25
AC:Complex/A:Admin/CI:Some/II:Some/E:Theoretical/TD:Uncommon [2]
Vulnerability: Cross site scripting

Affected versions: <9.7.1
CVE IDs: CVE-2026-10770
Description: 
This module provides spam protection using the CleanTalk cloud service.

The module doesn't sufficiently sanitize API response messages before
rendering them in HTML output. The _cleantalk_die() and ct_die() functions
output the CleanTalk API response message directly into HTML without proper
sanitization, allowing potential injection of arbitrary HTML or JavaScript.

This vulnerability is mitigated by the fact that an attacker must be able to
influence the CleanTalk cloud API response (e.g., through a man-in-the-middle
attack or a compromised API server).

Solution: 
Install the latest version:

 * If you use the Anti-Spam by CleanTalk module for Drupal upgrade to
   Anti-Spam by CleanTalk 9.7.1 [3]

Reported By: 
 * Ra Mänd (ram4nd) [4] provisional member of the Drupal Security Team

Fixed By: 
 * alexandergull [5]
 * anton1211 [6]
 * Ra Mänd (ram4nd) [7] provisional member of the Drupal Security Team

Coordinated By: 
 * Neil Drumm (drumm) [8] of the Drupal Security Team
 * Greg Knaddison (greggles) [9] of the Drupal Security Team
 * Juraj Nemec (poker10) [10] of the Drupal Security Team

Security
issue: 
https://git.drupalcode.org/security/185105-cleantalk-security/-/work_items/1
[11]
------------------------------------------------------------------------------
Contribution record [12]

[1] https://www.drupal.org/project/cleantalk
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/project/cleantalk/releases/9.7.1
[4] https://www.drupal.org/u/ram4nd
[5] https://www.drupal.org/u/alexandergull
[6] https://www.drupal.org/u/anton1211
[7] https://www.drupal.org/u/ram4nd
[8] https://www.drupal.org/u/drumm
[9] https://www.drupal.org/u/greggles
[10] https://www.drupal.org/u/poker10
[11]  
https://git.drupalcode.org/security/185105-cleantalk-security/-/work_items/1
[12]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3590085

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