CVE-2026-61873

Published: Jul 15, 2026Modified: Jul 15, 2026Deferred

7.2

Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: disclosure@vulncheck.com (Secondary)

Description

Grav before 9.1.8 contains an arbitrary file write vulnerability in the Form plugin's process.save.filename parameter, which is validated against path traversal before Twig processing but never re-validated after rendering. Attackers can submit form data containing path traversal sequences that are processed through Twig templates, allowing them to write arbitrary files including PHP webshells to the web root or other sensitive directories.

Related CWEs

CWE-73

External Control of File Name or Path

The product allows user input to control or influence paths or file names that are used in filesystem operations.

References (3)

https://github.com/getgrav/grav/security/advisories/GHSA-q532-mvx7-42qg

Source: disclosure@vulncheck.com

https://www.vulncheck.com/advisories/grav-before-arbitrary-file-write-via-twig-processed-filename

Source: disclosure@vulncheck.com

https://github.com/getgrav/grav/security/advisories/GHSA-q532-mvx7-42qg

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.