SB2021061540 - XML Entity Expansion in Opencast
Published: June 15, 2021 Updated: April 23, 2026
Security Bulletin ID
SB2021061540
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) XML Entity Expansion (CVE-ID: CVE-2021-32623)
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the XML parser when processing a crafted XML request. A remote user can send a specially crafted XML document to cause a denial of service.
Exploitation requires ingest privileges, and a single HTTP request can trigger the issue.
Remediation
Install update from vendor's website.