CVE-2021-47812
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Grav
PublishedJan 16, 2026
First seenJan 16, 2026
Weakness typeCWE-862Missing authorization
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| getgrav grav | 1.10.7 | — |
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