[Security-news] Block Attributes - Moderately critical - Cross-site Scripting - SA-CONTRIB-2025-090

[security-news at drupal.org]

View online: https://www.drupal.org/sa-contrib-2025-090

Project: Block Attributes [1]
Date: 2025-July-16
Security risk: *Moderately critical* 14 ∕ 25
AC:Basic/A:User/CI:Some/II:Some/E:Theoretical/TD:All [2]
Vulnerability: Cross-site Scripting

Affected versions: <1.1.0 || >=2.0.0 <2.0.1
CVE IDs: CVE-2025-7715
Description: 
This module allows you to define custom attributes for a block. You can
specify an attribute name to be added to the block in a predefined format.

The module does not sufficiently validate the provided attributes, which
makes it possible to insert JavaScript event attributes such as onmouseover,
onkeyup, etc. These attributes can execute JavaScript code when the page is
rendered, leading to cross-site scripting (XSS) vulnerabilities.

This vulnerability is partially mitigated by the requirement to manually add
the specific attributes and corresponding JavaScript code to the form after
the attribute has been created.

Solution: 
Install the latest version:

  * If you use the Block Attributes module for Drupal, upgrade to  Block
    Attributes 8.x-1.1 [3] or Block Attributes 2.0.1 [4].

Reported By: 
  * Pierre Rudloff (prudloff) [5] provisional member of the Drupal Security
    Team

Fixed By: 
  * Kostia Bohach (_shy) [6]

Coordinated By: 
  * Greg Knaddison (greggles) [7] of the Drupal Security Team
  * Juraj Nemec (poker10) [8] of the Drupal Security Team
  * Pierre Rudloff (prudloff), provisional member of the Drupal Security Team
    [9]
  * Jess  (xjm) [10] of the Drupal Security Team


[1] https://www.drupal.org/project/block_attributes
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/project/block_attributes/releases/8.x-1.1
[4] https://www.drupal.org/project/block_attributes/releases/2.0.1
[5] https://www.drupal.org/u/prudloff
[6] https://www.drupal.org/u/_shy
[7] https://www.drupal.org/u/greggles
[8] https://www.drupal.org/u/poker10
[9] https://www.drupal.org/u/prudloff
[10] https://www.drupal.org/u/xjm