CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVE-2021-32623
Medium (6.5) in apereo opencast. EPSS 1.3% chance of exploitation in the next 30 days. Fixed in org.opencastproject:opencast-kernel 9.6.
Opencast is a free and open source solution for automated video capture and distribution. Versions of Opencast prior to 9.6 are vulnerable to the billion laughs attack, which allows an attacker to easily execute a (seemingly permanent) denial of service attack, essentially taking down Opencast using a single HTTP request. To exploit this, users need to have ingest privileges, limiting the group of potential attackers The problem has been fixed in Opencast 9.6. There is no known workaround for this issue.
Severity
- EPSS
- 1.3% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-31)
- CWE
- CWE-776
- Published
- Modified
- Record from
- the NVD, synced
Affected
- apereo:opencast
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9gwx-9cwp-5c2m | Maven | org.opencastproject:opencast-kernel | <9.6 | 9.6 |
References
- https://github.com/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e
- https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m
- https://github.com/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e
- https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m