EUVD-2026-31381
GHSA-w38v-4c3f-mg76
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Stored cross-site scripting in the Simple Hierarchical Select (SHS) module for Drupal 7 (versions 7.x-1.0 through 7.x-1.10) enables authenticated attackers with taxonomy term editing privileges to inject malicious scripts via unsanitized term names. Two distinct code paths are confirmed vulnerable: field formatter output rendered by shs_field_formatter_view and term-tree child data generated by shs_term_get_children, both of which fail to apply proper output escaping before HTML rendering. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two concurrent conditions: (1) the attacker must hold a Drupal 7 role that grants permission to create or edit taxonomy terms - confirmed by the PR:L component of the CVSS 4.0 vector, meaning a low-privileged authenticated account is sufficient; and (2) a victim user must load a page that renders either the shs_field_formatter_view output or a term-tree widget populated by shs_term_get_children containing the poisoned term name, consistent with UI:P (passive interaction, no deliberate click required). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.1 reflects moderate severity, consistent with a stored XSS requiring authenticated access and passive victim interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An authenticated Drupal user holding a role with taxonomy term editing rights - such as a content editor, moderator, or compromised low-privilege account - navigates to the taxonomy term administration interface and saves a term name containing a JavaScript payload (e.g., a script tag or event handler attribute). When any other authenticated or anonymous user subsequently loads a page that renders the SHS field formatter widget or triggers term-tree child data generation for the poisoned term, the injected script executes in the victim's browser context, enabling session token theft, credential harvesting, or DOM manipulation. … |
| Remediation | No specific patched version number was identified in the available source data; the Tag1 advisory at https://d7es.tag1.com/security-advisories/simple-hierarchical-select-moderately-critical-cross-site-scripting should be consulted directly for the recommended upgrade target. … Detailed patch versions, workarounds, and compensating controls in full report. |
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