CVE-2021-47812
CRITICAL EPSS 78.1%
Published Jan 16, 20265mo ago · Modified Jun 17, 20261w ago
9.3 CVSS 4.0
Published Jan 16, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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 Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
78.1% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available
Weaknesses 1
CWE-862 Missing Authorization Authorization
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| getgrav | grav | 1.10.7 | any |
References 3
- getgrav.org https://getgrav.org
- exploit-db.com https://www.exploit-db.com/exploits/49973
- vulncheck.com https://www.vulncheck.com/advisories/gravcms-arbitrary-yaml-writeupdate-unauthenticated
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.