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CVE-2021-29439

7.2 · HIGH

The Grav admin plugin prior to version 1.10.11 does not correctly verify caller's privileges.

Published Apr 13, 2021CWE-863EPSS 2.59%

Overview

CVE-2021-29439 is a high-severity vulnerability. It was published on April 13, 2021 and has a CVSS 3.1 base score of 7.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

The Grav admin plugin prior to version 1.10.11 does not correctly verify caller's privileges. As a consequence, users with the permission `admin.login` can install third-party plugins and their dependencies. By installing the right plugin, an attacker can obtain an arbitrary code execution primitive and elevate their privileges on the instance. The vulnerability has been addressed in version 1.10.11. As a mitigation blocking access to the `/admin` path from untrusted sources will reduce the probability of exploitation.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/getgrav/grav-plugin-admin/commit/a220359877fd1281f76ba732e5308e0e3002e4b1GitHubgithub.com/getgrav/grav-plugin-admin/security/advisories/GHSA-wg37-cf5x-55hqGitHubgithub.com/getgrav/grav-plugin-admin/commit/a220359877fd1281f76ba732e5308e0e3002e4b1GitHubgithub.com/getgrav/grav-plugin-admin/security/advisories/GHSA-wg37-cf5x-55hq

How CyberStrike helps

Frequently asked questions

What is CVE-2021-29439?

CVE-2021-29439 is a high-severity vulnerability. It was published on April 13, 2021 and has a CVSS 3.1 base score of 7.2 (HIGH).

How severe is CVE-2021-29439?

This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-29439?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-29439?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-29439 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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