CVE-2026-85603: Grav Admin Plugin Path Traversal via Save As Language Code

Severity: medium (CVSS 6.5 v3.1)
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: 2026-09-04 · updated 2026-09-14
Weakness: CWE-73

Description

Grav versions before 1.10.55 contain a path traversal vulnerability in the admin plugin's Save As action that fails to validate the language code parameter. An authenticated admin user with admin.pages.create permission can supply directory traversal sequences in the lang POST field to write arbitrary .md files outside the pages directory with attacker-controlled content.

Affected products

getgrav grav: before 1.10.55 — fixed in 1.10.55

How to fix

Upgrade to a fixed version: getgrav grav 1.10.55. Check the vendor advisory for mitigations.

References

https://github.com/getgrav/grav/security/advisories/GHSA-h9g9-73c3-23c9
https://www.vulncheck.com/advisories/grav-admin-plugin-path-traversal-via-save-as-language-code

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