XSS in Drupal 7 SHS module (7.x-1.0 7.x-1.10) via term names
CVE-2026-4929 Published on May 21, 2026
Simple Hierarchical Select (Drupal 7) XSS in term-derived output
Simple Hierarchical Select (SHS) for Drupal 7 contains cross-site scripting risk due to improper output escaping of term-derived text. Confirmed affected paths include field formatter output (shs_field_formatter_view) and term-tree child-term data generation (shs_term_get_children). Malicious taxonomy term names can be rendered unsafely depending on output context.
This affects versions from 7.x-1.0 through (and including) 7.x-1.10.
Vulnerability Analysis
CVE-2026-4929 can be exploited with network access. This vulnerability is considered to have a low attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2026-4929. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and 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-2026-4929 has been classified to as a XSS vulnerability or weakness.
Affected Versions
Drupal Simple Hierarchical Select (shs):- Version 7.x-1.0 and below 7.x-1.11 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.