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CVE-2021-21422

8.1 · HIGH

mongo-express is a web-based MongoDB admin interface, written with Node.js and express.

Published Jun 21, 2021CWE-79EPSS 1.57%

Overview

CVE-2021-21422 is a high-severity vulnerability. It was published on June 21, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

mongo-express is a web-based MongoDB admin interface, written with Node.js and express. 1: As mentioned in this issue: https://github.com/mongo-express/mongo-express/issues/577, when the content of a cell grows larger than supported size, clicking on a row will show full document unescaped, however this needs admin interaction on cell. 2: Data cells identified as media will be rendered as media, without being sanitized. Example of different renders: image, audio, video, etc. As an example of type 1 attack, an unauthorized user who only can send a large amount of data in a field of a document may use a payload with embedded javascript. This could send an export of a collection to the attacker without even an admin knowing. Other types of attacks such as dropping a database\collection are possible.

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/mongo-express/mongo-express/commit/f5e0d4931f856f032f22664b5e5901d5950cfd4bGitHubgithub.com/mongo-express/mongo-express/issues/577GitHubgithub.com/mongo-express/mongo-express/security/advisories/GHSA-7p8h-86p5-wv3pGitHubgithub.com/mongo-express/mongo-express/commit/f5e0d4931f856f032f22664b5e5901d5950cfd4bGitHubgithub.com/mongo-express/mongo-express/issues/577GitHubgithub.com/mongo-express/mongo-express/security/advisories/GHSA-7p8h-86p5-wv3p

How CyberStrike helps

Frequently asked questions

What is CVE-2021-21422?

CVE-2021-21422 is a high-severity vulnerability. It was published on June 21, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2021-21422?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-21422?

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-2021-21422?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-21422 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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