Unauthenticated super-administrator access via unchecked registration fields
Published May 11, 2026 · Updated May 11, 2026
Privilege escalation in Grav before 2.0.0-beta.2 allows remote attackers to self-register with super-administrator access. Login::register() assigns attacker-controlled groups and access POST fields directly to the new user after validateField() leaves them unchecked. Registration must be enabled and groups or access must appear in the configured allowed fields; successful exploitation grants full administrative control.
Summary
What happened
Privilege escalation in Grav before 2.0.0-beta.2 allows remote attackers to self-register with super-administrator access. Login::register() assigns attacker-controlled groups and access POST fields directly to the new user after validateField() leaves them unchecked. Registration must be enabled and groups or access must appear in the configured allowed fields; successful exploitation grants full administrative control.
The record
- CVE
- CVE-2026-42613
- Published
- May 11, 2026
- Updated
- May 11, 2026
- Vendor
- Grav
- Product
- Grav
- Classifications
- CWE-20, CWE-862, T1136.001, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 11, 2026CVE publishedPublication date reported by the CVE source.
- May 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 2.0.0-beta.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Unauthenticated malicious registration requestproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo