[IT-SecNots] [Security-news] Feed Block - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-137

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-137

Project: Feed Block [1]
Date: 2026-September-09
Security risk: *Moderately critical* 13 ∕ 25
AC:Complex/A:User/CI:Some/II:Some/E:Theoretical/TD:All [2]
Vulnerability: Cross-site scripting

Affected versions: <2.0.2 || >=3.0.0 <3.0.2
CVE IDs: CVE-2026-87939
Description: 
The Feed Block module provides a block content type that displays items
pulled from a remote RSS/Atom feed.

The module does not sufficiently validate or sanitize the RSS feed it
generates, resulting in a stored cross-site scripting (XSS) vulnerability.

Solution: 
Install the latest version:

 * If you use the 3.x branch, upgrade to Feed Block 3.0.2 [3].
 * If you use the 2.x branch, upgrade to Feed Block 2.0.2 [4].

Reported By: 
 * Marcus Johansson (marcus_johansson) [5]

Fixed By: 
 * Greg Knaddison (greggles) [6] of the Drupal Security Team
 * Mark Fullmer (mark_fullmer) [7]
 * mmarler [8]

Coordinated By: 
 * Bram Driesen (bramdriesen) [9] of the Drupal Security Team
 * Greg Knaddison (greggles) [10] of the Drupal Security Team
 * Juraj Nemec (poker10) [11] of the Drupal Security Team
 * Jess  (xjm) [12] of the Drupal Security Team
 * Swan Kalata (akalata) [13] of the Drupal Security Team

------------------------------------------------------------------------------
Contribution record [14]

[1] https://www.drupal.org/project/feed_block
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/project/feed_block/releases/3.0.2
[4] https://www.drupal.org/project/feed_block/releases/2.0.2
[5] https://www.drupal.org/u/marcus_johansson
[6] https://www.drupal.org/u/greggles
[7] https://www.drupal.org/u/mark_fullmer
[8] https://www.drupal.org/u/mmarler
[9] https://www.drupal.org/u/bramdriesen
[10] https://www.drupal.org/u/greggles
[11] https://www.drupal.org/u/poker10
[12] https://www.drupal.org/u/xjm
[13] https://www.drupal.org/u/akalata
[14]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3615545

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