Drupal Feed Block XSS (before v3.0.3)
CVE-2026-87939 Published on October 22, 2026
Feed Block - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-137
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.
Vulnerability Analysis
CVE-2026-87939 can be exploited with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-87939 has been classified to as a XSS vulnerability or weakness.
Affected Versions
Drupal Feed Block:- Version 0.0.0 and below 2.0.2 is affected.
- Version 3.0.0 and below 3.0.2 is affected.