TI-2026-30893 Aliases CVE-2026-42613 GHSA-pxm6-mhxr-q4mj

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

HIGH 82CWE-20Published 2026-05-11 · Updated 2026-05-12

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-862.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01135 66th percentileScored 2026-11-07

Fix Fixed grav (getgrav): 2.0.0-beta.2getgrav/grav (Packagist): 2.0.0-beta.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
getgrav	grav	before 2.0.0-beta.2	2.0.0-beta.2	Patch available	CNA
—	getgrav/grav (Packagist)	before 2.0.0-beta.2	2.0.0-beta.2	Patch available	GHSA-pxm6-mhxr-q4mj

grav Vendorgetgrav Affected before 2.0.0-beta.2 Fixed in 2.0.0-beta.2 Patch available CNA
getgrav/grav (Packagist) Vendor— Affected before 2.0.0-beta.2 Fixed in 2.0.0-beta.2 Patch available GHSA-pxm6-mhxr-q4mj

Remediation

Fix · CNA grav (getgrav) Fixed in 2.0.0-beta.2
Fix · GHSA-pxm6-mhxr-q4mj getgrav/grav (Packagist) Fixed in 2.0.0-beta.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-42613
2026-10-03 Alias added: GHSA-pxm6-mhxr-q4mj
2026-10-25 EPSS moved to the 50th–90th percentile

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-42613

Other 4

TI-2025-28971 Cross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to… CVSS 3.1CRITICAL 9.8
TI-2021-04523 Unauthenticated Arbitrary YAML Write/Update leads to Code Execution CVSS 3.1CRITICAL 9.8
TI-2026-50940 Grav CMS before 2.0.16 Origin Validation Bypass via Referer CVSS 4.0CRITICAL 9.3
TI-2026-46446 Grav before 2.0.7 Remote Code Execution via Blueprint dynamicData CVSS 4.0CRITICAL 9.3
TI-2021-22428 GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2) CVSS 4.0CRITICAL 9.3
TI-2025-41064 In grav <1.7.49.5, a SSRF (Server-Side Request Forgery) vector may be triggered via Twig… CVSS 3.1CRITICAL 9.1

See all 228 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences