CVE-2021-47812

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/16/2026

Last Modified2/2/2026

Sourcenvd

Honeypot Sightings0

Affected Products

getgrav:grav

Weaknesses (CWE)

CWE-862

References

https://getgrav.org(disclosure@vulncheck.com)

https://www.exploit-db.com/exploits/49973(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/gravcms-arbitrary-yaml-writeupdate-unauthenticated(disclosure@vulncheck.com)

https://www.exploit-db.com/exploits/49973(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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