SB2021121035 - Relative Path Traversal in OpenOlat
Published: December 10, 2021 Updated: April 27, 2026
Security Bulletin ID
SB2021121035
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Relative Path Traversal (CVE-ID: CVE-2021-41242)
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 update from vendor's website.