CVE-2026-42613
CRITICALGrav: Privilege Escalation via Missing Server-Side Validation of groups/access
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/getgrav/grav/security/advisories/GHSA-pxm6-mhxr-q4mj
X_Refsource_Misc x_refsource_misc
https://github.com/getgrav/grav-plugin-login/commit/3d419a0dabd70aed1fd49afcd5919004a4141da1
Scores
CVSS v3
9.4
EPSS
0.0094
EPSS Percentile
56.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
total
Details
CWE
CWE-20
CWE-862
Status
published
Products (2)
getgrav/grav
0 - 2.0.0-beta.2Packagist
getgrav/grav
< 2.0.0-beta.2
Published
May 11, 2026
Tracked Since
May 11, 2026