CVE-2021-47812

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://getgrav.org	Product
https://www.exploit-db.com/exploits/49973	Exploit
https://www.vulncheck.com/advisories/gravcms-arbitrary-yaml-writeupdate-unauthenticated	Third Party Advisory
https://www.exploit-db.com/exploits/49973	Exploit

Configurations

Configuration 1 (hide)

cpe:2.3:a:getgrav:grav:1.10.7:*:*:*:*:*:*:*

History

30 Jan 2026, 00:47

Type	Values Removed	Values Added
References	~~() https://getgrav.org -~~	() https://getgrav.org - Product
References	~~() https://www.exploit-db.com/exploits/49973 -~~	() https://www.exploit-db.com/exploits/49973 - Exploit
References	~~() https://www.vulncheck.com/advisories/gravcms-arbitrary-yaml-writeupdate-unauthenticated -~~	() https://www.vulncheck.com/advisories/gravcms-arbitrary-yaml-writeupdate-unauthenticated - Third Party Advisory
CPE		cpe:2.3:a:getgrav:grav:1.10.7:::::::*
First Time		Getgrav grav Getgrav

16 Jan 2026, 22:16

Type	Values Removed	Values Added
References	~~() https://www.exploit-db.com/exploits/49973 -~~	() https://www.exploit-db.com/exploits/49973 -

16 Jan 2026, 00:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-16 00:16

Updated : 2026-01-30 00:47

NVD link : CVE-2021-47812

Mitre link : CVE-2021-47812

CVE.ORG link : CVE-2021-47812

JSON object : View

Products Affected

getgrav

grav

CWE

CWE-862

Missing Authorization

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