CVE-2026-4929

Simple Hierarchical Select (Drupal 7) XSS in term-derived output

State: Published
Severity: 5.1 Medium
Published: May 21, 2026
Updated: May 22, 2026
Reserved: Mar 26, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	5.1 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N	drupal

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
Simple Hierarchical Select (shs)Drupal	7.x-1.0 to before 7.x-1.11Affected

References

NES patch branch comparisonthird-party-advisory
https://d7es.tag1.com/security-advisories/simple-hierarchical-select-moderately-critical-cross-site-scriptingthird-party-advisory
https://www.herodevs.com/vulnerability-directory/cve-2026-4929?nes-for-drupal-7exploit

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