Relative Path Traversal in OpenOlat - CVE-2021-41242
Published: December 10, 2021 / Updated: April 27, 2026
Vulnerability identifier: #VU128160
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-41242
CWE-ID: CWE-23
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
OpenOlat
OpenOlat
Software vendor:
OpenOlat
OpenOlat
Description
The vulnerability allows a remote user to write files to arbitrary locations on the target system.
The vulnerability exists due to relative path traversal in some REST methods when processing a filename parameter containing a relative path. A remote user can supply a crafted filename parameter to write files to arbitrary locations on the target system.
Exploitation requires an enabled REST API and rights on a business object to call the vulnerable REST methods.
Remediation
Install security update from vendor's website.