CVE-2021-47812

critical · 9.3

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.

9.3

CVSS

2.2%

EPSS (exploit prob.)

82nd

EPSS percentile

2026-01-16

Published

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

Weaknesses

CWE-862

Affected products

Vendor	Product	Affected versions
getgrav	grav	1.10.7

Check a specific version with /api/v1/cve/match.

References

https://getgrav.org
https://www.exploit-db.com/exploits/49973
https://www.vulncheck.com/advisories/gravcms-arbitrary-yaml-writeupdate-unauthenticated
https://www.exploit-db.com/exploits/49973

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2021-47812