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CVE-2021-31552

5.4 · MEDIUM

An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2.

Published Apr 22, 2021CWE-863EPSS 0.58%

Overview

CVE-2021-31552 is a medium-severity vulnerability. It was published on April 22, 2021 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. It incorrectly executed certain rules related to blocking accounts after account creation. Such rules would allow for user accounts to be created while blocking only the IP address used to create an account (and not the user account itself). Such rules could also be used by a nefarious, unprivileged user to catalog and enumerate any number of IP addresses related to these account creations.

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

Refgerrit.wikimedia.org/r/q/I8bae477ad7e4d0190335363ac2decf28e4313da1Refphabricator.wikimedia.org/T152394Refgerrit.wikimedia.org/r/q/I8bae477ad7e4d0190335363ac2decf28e4313da1Refphabricator.wikimedia.org/T152394

How CyberStrike helps

Frequently asked questions

What is CVE-2021-31552?

CVE-2021-31552 is a medium-severity vulnerability. It was published on April 22, 2021 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2021-31552?

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-31552?

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-2021-31552?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-31552 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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