Craft CMS before 5.10.11 Authentication Bypass via Admin Flag Inheritance
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-269.
Summary
Craft CMS before 5.10.11 fails to validate the admin flag during user registration, allowing it to persist from deactivated admin accounts. Attackers can register with a deactivated admin's email address to inherit administrator privileges when public registration and disabled email verification are configured.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA cms (craftcms) Fixed in 5.10.11
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
craftcms cms 5.10.11
10 records Highest priority Priority MEDIUM 5 MEDIUM, 5 LOW
Other records, highest priority first
- TI-2026-58290 Craft CMS 5.0.0-RC1 before 5.10.11 Stored XSS via site namePriority MEDIUM 55
- TI-2026-58298 Craft CMS 5.0.0-RC1 before 5.10.11 Authentication Bypass via administrateUsersPriority MEDIUM 40
- TI-2026-58293 Craft CMS 5.0.0-RC1 before 5.10.11 GraphQL Entry Mutation Site Scope BypassPriority MEDIUM 40
Timeline
- 2026-10-02 Threatist record created from CVE-2026-84795
- 2026-10-03 Alias added: GHSA-c8qg-58pw-vmfc
References
More Craft CMS vulnerabilities
- 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
Sources
- CVE-2026-84795 · CVE Program
- CVE-2026-84795 · NVD
- FIRST EPSS
- GHSA-c8qg-58pw-vmfc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences