What’s Vulnerable › Vulnerabilities

CVE-2026-42613: Grav: Privilege Escalation via Missing Server-Side Validation of groups/access

• Severity: critical (CVSS 9.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-11 · updated 2026-10-26
• Weakness: CWE-20

Description

Grav is a file-based Web platform. Prior to 2.0.0-beta.2, the Login::register() method in the Login plugin accepts attacker-controlled groups and access fields from the registration POST data without server-side validation. When registration is enabled and groups or access are included in the configured allowed fields list, an unauthenticated user can self-register with admin.super privileges by injecting these fields into the registration request. This vulnerability is fixed in 2.0.0-beta.2.

Affected products

• getgrav grav: before 2.0.0-beta.2

References

• https://github.com/getgrav/grav-plugin-login/commit/3d419a0dabd70aed1fd49afcd5919004a4141da1
• https://github.com/getgrav/grav/security/advisories/GHSA-pxm6-mhxr-q4mj
• https://github.com/getgrav/grav/security/advisories/GHSA-w48r-jppp-rcfw

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