CVE-2026-86194: Grav Form Plugin before 9.1.22 Cross-Page Form Execution

Severity: medium (CVSS 6.9 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-05 · updated 2026-09-18
Weakness: CWE-862

Description

Grav Form Plugin before 9.1.22 fails to verify page authorization when resolving forms by name across pages, allowing anonymous visitors to execute form actions defined on login-restricted or unpublished pages. Attackers can POST to any public page with a restricted form's name to trigger save, upload, email, or call actions without authentication.

Affected products

getgrav grav-plugin-form: before 9.1.22 — fixed in 9.1.22

How to fix

Upgrade to a fixed version: getgrav grav-plugin-form 9.1.22. Check the vendor advisory for mitigations.

References

https://github.com/getgrav/grav/security/advisories/GHSA-33m4-m988-5fvh
https://www.vulncheck.com/advisories/grav-form-plugin-before-9.1.22-cross-page-form-execution

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