Privilege escalation in Getgrav Grav
CVE-2026-72828
Grav Plugin API (getgrav/grav-plugin-api) before 1.0.13 fails to enforce API-key scope caps in InvitationsController. The strip-super and accept-groups decisions are gated on a bare isSuperAdmin() check rather than a scope-aware permission check, so a least-privilege API key (scoped to api.users.write) minted on a super account can create an invitation record containing super-admin access flags. When the invitation is accepted, those flags are written verbatim to the new account, resulting in privilege escalation to a fully controlled super account.
Vulnerability class: Privilege Escalation
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Getgrav Grav — versions 0, 1.0.13
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-72828?
- CVE-2026-72828 is a high-severity vulnerability in Getgrav Grav, classified under Improper Privilege Management. CVSS score: 7.2/10. Published 2026-08-14.
- How severe is CVE-2026-72828?
- High severity. CVSS v3 base score is 7.2 out of 10.