by Kastro
Paper/Archive/CVE-2026-84795

CVE-2026-84795

craftcms cms — Craft CMS before 5.10.11 Authentication Bypass via Admin Flag Inheritance

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
38
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 43.7.437 × 208.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
cms5.0.0-RC1 – < 5.10.115.10.11CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorygithub.com/craftcms/cms/security/advisories/GHSA-242m-9wq7-vhwqwriteupvulncheck.com/advisories/craft-cms-before-5.10.11-authentication-bypass-via-admin-flag-inheritance