CVE-2026-77614
highOpencast is a free, open-source platform to support the management of educational audio and video content.
Opencast is a free, open-source platform to support the management of educational audio and video content. Prior to versions 19.7 and 20.2, the default security configuration in etc/security/mh_default_org.xml accepts a client-selected JSESSIONID from the ;jsessionid= URL path parameter and does not replace it when the victim logs in. An unauthenticated attacker can send a crafted link to a victim whose browser has no active Opencast session cookie, wait for the victim to authenticate, and then reuse the known identifier as the victim's authenticated session. This can expose the victim's data and actions and can produce full administrative account takeover when the victim is an administrator. This issue is fixed in versions 19.7 and 20.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/opencast/opencast/commit/c36652250a026afb7cf78b663950c702669f1d3f security-advisories@github.com
- https://github.com/opencast/opencast/commit/ff84128c9b3bcbd79c28192d25929dab8faf185f security-advisories@github.com
- https://github.com/opencast/opencast/releases/tag/19.7 security-advisories@github.com
- https://github.com/opencast/opencast/releases/tag/20.2 security-advisories@github.com
- https://github.com/opencast/opencast/security/advisories/GHSA-6f53-jp7x-gg7p security-advisories@github.com
- https://github.com/opencast/opencast/security/advisories/GHSA-6f53-jp7x-gg7p 134c704f-9b21-4f2e-91b3-4a467353bcc0