CVE-2026-61873

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/getgrav/grav/security/advisories/GHSA-q532-mvx7-42qg
https://www.vulncheck.com/advisories/grav-before-arbitrary-file-write-via-twig-processed-filename
https://github.com/getgrav/grav/security/advisories/GHSA-q532-mvx7-42qg

Configurations

No configuration.

History

15 Jul 2026, 19:18

Type	Values Removed	Values Added
References	~~() https://github.com/getgrav/grav/security/advisories/GHSA-q532-mvx7-42qg -~~	() https://github.com/getgrav/grav/security/advisories/GHSA-q532-mvx7-42qg -

15 Jul 2026, 12:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-15 12:18

Updated : 2026-07-15 19:50

NVD link : CVE-2026-61873

Mitre link : CVE-2026-61873

CVE.ORG link : CVE-2026-61873

JSON object : View

Products Affected

No product.

CWE

CWE-73

External Control of File Name or Path

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