CVE-2021-47812 - CVE House
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Status published Critical CVE-2021-47812

GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2)

Vulnerability Description

GravCMS 1.10.7 contains an unauthenticated vulnerability that allows remote attackers to write arbitrary YAML configuration and execute PHP code through the scheduler endpoint. Attackers can exploit the admin-nonce parameter to inject base64-encoded payloads and create malicious custom jobs with system command execution.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

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Affected Vendor

Affected Software

GravCMS
Vulnerable Versions:
1.10.7

Timeline

Official Publish: January 15th, 2026
Last Modified: April 7th, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)