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Vulnerability record · CVE-2021-41152 · published 18 October 2021

CVE-2021-41152: Frentix openolat path traversal vulnerability

Frentix · Openolat

OpenOlat is a web-based e-learning platform for teaching, learning, assessment and communication, an LMS, a learning management system. In affected versions by manipulating the HTTP request an attacker can modify the path of a requested file download in the folder component to point to anywhere on the target system. The attack could be used to read any file accessible in the web root folder or outside, depending on the configuration of the system and the properly configured permission of the application server user. The attack requires an OpenOlat user account or the enabled guest user feature together with the usage of the folder component in a course. The attack does not allow writing of arbitrary files, it allows only reading of files and also only ready of files that the attacker knows the exact path which is very unlikely at least for OpenOlat data files. The problem is fixed in version 15.5.8 and 16.0.1 It is advised to upgrade to version 16.0.x. There are no known workarounds to fix this problem, an upgrade is necessary.

7.7 CVSS 3.1 High EPSS 1.2% · top 32.1% CWE-22 · Path traversalCWE-23 · Relative path traversal
7.7CVSS 3.1 base score, v2 4.0
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

OpenOlat is a web-based e-learning platform for teaching, learning, assessment and communication, an LMS, a learning management system. In affected versions by manipulating the HTTP request an attacker can modify the path of a requested file download in the folder component to point to anywhere on the target system. The attack could be used to read any file accessible in the web root folder or outside, depending on the configuration of the system and the properly configured permission of the application server user. The attack requires an OpenOlat user account or the enabled guest user feature together with the usage of the folder component in a course. The attack does not allow writing of arbitrary files, it allows only reading of files and also only ready of files that the attacker knows the exact path which is very unlikely at least for OpenOlat data files. The problem is fixed in version 15.5.8 and 16.0.1 It is advised to upgrade to version 16.0.x. There are no known workarounds to fix this problem, an upgrade is necessary.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/OpenOLAT/OpenOLAT/commit/418bb509ffcb0e25ab4390563c6c47f0458583eb PatchThird Party Advisory
https://github.com/OpenOLAT/OpenOLAT/security/advisories/GHSA-m8j5-837g-2p3f Third Party Advisory
https://jira.openolat.org/browse/OO-5696 Permissions RequiredVendor Advisory
https://github.com/OpenOLAT/OpenOLAT/commit/418bb509ffcb0e25ab4390563c6c47f0458583eb PatchThird Party Advisory
https://github.com/OpenOLAT/OpenOLAT/security/advisories/GHSA-m8j5-837g-2p3f Third Party Advisory
https://jira.openolat.org/browse/OO-5696 Permissions RequiredVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-31946Frentix openolat improper authentication vulnerabilityOpenOlat is an open source web-based e-learning platform for teaching, learning, assessment and communication. From version 10.5.4 to before version …EPSS 0.33%8.8CVE-2026-28228Frentix openolat vulnerabilityOpenOlat is an open source web-based e-learning platform for teaching, learning, assessment and communication. Prior to versions 19.1.31, 20.1.18, an…EPSS 0.53%8.8CVE-2021-39181Frentix openolat xml injection vulnerabilityOpenOlat 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 cour…EPSS 1.9%8.8CVE-2021-39180Frentix openolat path traversal vulnerabilityOpenOLAT is a web-based learning management system (LMS). A path traversal vulnerability exists in versions prior to 15.3.18, 15.5.3, and 16.0.0. Usi…EPSS 2.4%8.1CVE-2021-41242Frentix openolat relative path traversal vulnerabilityOpenOlat is a web-basedlearning management system. A path traversal vulnerability exists in OpenOlat prior to versions 15.5.12 and 16.0.5. By providi…EPSS 1.4%7.5CVE-2024-28198Frentix openolat xml external entity (xxe) vulnerabilityOpenOlat is an open source web-based e-learning platform for teaching, learning, assessment and communication. By manually manipulating http requests…EPSS 0.43%5.4CVE-2024-25973Frentix openolat improper input validation vulnerabilityThe Frentix GmbH OpenOlat LMS is affected by multiple stored Cross-Site Scripting (XSS) vulnerabilities. An attacker with rights to create or edit gr…EPSS 0.56%5.4CVE-2024-25974Frentix openolat improper input validation vulnerabilityThe Frentix GmbH OpenOlat LMS is affected by stored a Cross-Site Scripting (XSS) vulnerability. It is possible to upload files within the Media Cente…EPSS 0.55%

Source: NIST National Vulnerability Database (record CVE-2021-41152), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.