[IT-SecNots] [Security-news] Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-160

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-160

Project: Webform [1]
Project machine name: webform
Date: 2026-September-23
Security risk: *Moderately critical* 13 ∕ 25
AC:Complex/A:None/CI:Some/II:Some/E:Theoretical/TD:Uncommon [2]
Vulnerability: Cross-site scripting

Affected versions: <6.2.12 || >=6.3.0 <6.3.1
CVE IDs: CVE-2026-96362
Description: 
The Webform module allows site builders to create forms, collect submissions,
and configure access to forms and submission data. Site builders may also
configure handlers for processing submissions. Remote Post Handlers send
webform data to other servers via APIs.

The module does not sufficiently filter response values from the Remote Post
handler before those values are rendered through handler response tokens. If
a site uses Remote Post handler response tokens in rendered output, values
returned by a configured remote endpoint could be rendered as HTML, resulting
in a cross-site scripting vulnerability.

This vulnerability is mitigated by the fact that an attacker must be able to
control or influence the response from a configured remote endpoint, and the
site must use Remote Post handler response tokens in rendered output.

Solution: 
Install the latest version:

 * If you use the 6.2.x branch of Webform upgrade to Webform 6.2.12 [3].
 * If you use the 6.3.x branch of Webform, upgrade to Webform 6.3.1 [4].

Reported By: 
 * Brian Willows (hsjbrianwillows) [5]

Fixed By: 
 * Jacob Rockowitz (jrockowitz) [6]
 * Lee Rowlands (larowlan) [7] of the Drupal Security Team

Coordinated By: 
 * Swan Kalata (akalata) [8] of the Drupal Security Team
 * Bram Driesen (bramdriesen) [9] of the Drupal Security Team
 * cilefen  (cilefen) [10] of the Drupal Security Team
 * Greg Knaddison (greggles) [11] of the Drupal Security Team
 * Juraj Nemec (poker10) [12] of the Drupal Security Team
 * Jess  (xjm) [13] of the Drupal Security Team

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

[1] https://www.drupal.org/project/webform
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/project/webform/releases/6.2.12
[4] https://www.drupal.org/project/webform/releases/6.3.1
[5] https://www.drupal.org/u/hsjbrianwillows
[6] https://www.drupal.org/u/jrockowitz
[7] https://www.drupal.org/u/larowlan
[8] https://www.drupal.org/u/akalata
[9] https://www.drupal.org/u/bramdriesen
[10] https://www.drupal.org/u/cilefen
[11] https://www.drupal.org/u/greggles
[12] https://www.drupal.org/u/poker10
[13] https://www.drupal.org/u/xjm
[14]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3601420

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