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TI-2026-40744 Aliases CVE-2026-56381GHSA-g3hp-vvqf-8vw6

Craft CMS - Stored XSS via User Group Name in User Permissions Page

Priority MEDIUM 54CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00181 7th percentileScored 2026-11-07
Fix Fixed cms (craftcms): 5.8.22craftcms/cms (Packagist): 5.8.22

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Craft CMScms5.0.0-RC1 to before 5.8.225.8.22Patch availableCNA
—craftcms/cms (Packagist)5.0.0-RC1 to before 5.8.225.8.22Patch availableGHSA-g3hp-vvqf-8vw6
  • cms VendorCraft CMS Affected 5.0.0-RC1 to before 5.8.22 Fixed in 5.8.22 Patch available CNA
  • craftcms/cms (Packagist) Vendor— Affected 5.0.0-RC1 to before 5.8.22 Fixed in 5.8.22 Patch available GHSA-g3hp-vvqf-8vw6

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*——Craft CMS
  • cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* Versions — — ·Craft CMS

Remediation

  • Fix · CNA cms (craftcms) Fixed in 5.8.22
  • Fix · GHSA-g3hp-vvqf-8vw6 craftcms/cms (Packagist) Fixed in 5.8.22 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-56381
  2. 2026-10-03 Alias added: GHSA-g3hp-vvqf-8vw6

References

Advisory 2

Other 2

  • TI-2025-23503 Craft CMS Allows Remote Code Execution KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-37138 RCE when PHP `register_argc_argv` config setting is enabled in craftcms/cms KEVCVSS 4.0CRITICAL 9.3
  • TI-2025-16994 Potential RCE with a compromised security key in craft/cms KEVCVSS 3.1HIGH 8.1
  • TI-2025-24595 Craft CMS stores user-provided content in session files KEVCVSS 4.0MEDIUM 6.9
  • TI-2023-22284 Craft CMS Remote Code Execution vulnerability CVSS 3.1CRITICAL 10.0
  • TI-2024-25171 Craft CMS up to v3.7.31 was discovered to contain a SQL injection vulnerability via the GraphQL API endpoint. CVSS 3.1CRITICAL 9.8
See all 203 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences