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CVE-2021-39181

8.8 · HIGH

OpenOlat is a web-based learning management system (LMS).

Published Sep 1, 2021CWE-91EPSS 1.91%

Overview

CVE-2021-39181 is a high-severity vulnerability. It was published on September 1, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

OpenOlat is a web-based learning management system (LMS). Prior to version 15.3.18, 15.5.3, and 16.0.0, using a prepared import XML file (e.g. a course) any class on the Java classpath can be instantiated, including spring AOP bean factories. This can be used to execute code arbitrary code by the attacker. The attack requires an OpenOlat user account with the authoring role. It can not be exploited by unregistered users. The problem is fixed in versions 15.3.18, 15.5.3, and 16.0.0. There are no known workarounds aside from upgrading.

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/OpenOLAT/OpenOLAT/commit/3f219ac457afde82e3be57bc614352ab92c05684GitHubgithub.com/OpenOLAT/OpenOLAT/security/advisories/GHSA-596v-3gwh-2m9wRefjira.openolat.org/browse/OO-5548GitHubgithub.com/OpenOLAT/OpenOLAT/commit/3f219ac457afde82e3be57bc614352ab92c05684GitHubgithub.com/OpenOLAT/OpenOLAT/security/advisories/GHSA-596v-3gwh-2m9wRefjira.openolat.org/browse/OO-5548

How CyberStrike helps

Frequently asked questions

What is CVE-2021-39181?

CVE-2021-39181 is a high-severity vulnerability. It was published on September 1, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2021-39181?

This vulnerability has a CVSS 3.1 base score of 8.8, 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-2021-39181?

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-2021-39181?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-39181 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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