CVE-2021-47812
CVSS v3
9.8
CRITICAL
EPSS Score
2.2 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2026-01-15
- Last Modified
- 2026-02-02
Frequently asked questions
What is 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.
Is CVE-2021-47812 actively exploited?
Active exploitation of CVE-2021-47812 has not been confirmed. Its EPSS score was 2.2% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-47812?
CVE-2021-47812 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-47812 affecting your environment?
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