CVE-2026-77614
8.8 HIGHpublic exploit availablePublished 2026-09-17 · Updated 2026-09-17
AI risk analysis
- Summary
- The flaw allows an unauthenticated attacker to exploit a JSESSIONID vulnerability in Opencast versions prior to 19.7 and 20.2, leading to session hijacking and potential full administrative account takeover.
- Exploitability
- Exploitation requires sending a crafted link to a victim with no active session cookie, and waiting for the victim to authenticate. The attacker must have access to the victim's browser session.
- Blast radius
- If exploited, this can expose the victim's data and actions, and potentially lead to full administrative control of the Opencast system.
- Detection
- No reliable host or network indicator is derivable from the published description.
- Prioritized remediation
- Upgrade to Opencast version 19.7 or 20.2 or later.
Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.
NVD description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-384
Public exploit & PoC references
- https://github.com/opencast/opencast/commit/c36652250a026afb7cf78b663950c702669f1d3f
- https://github.com/opencast/opencast/commit/ff84128c9b3bcbd79c28192d25929dab8faf185f
- https://github.com/opencast/opencast/releases/tag/19.7
- https://github.com/opencast/opencast/releases/tag/20.2
- https://github.com/opencast/opencast/security/advisories/GHSA-6f53-jp7x-gg7p
- https://github.com/opencast/opencast/security/advisories/GHSA-6f53-jp7x-gg7p
All references
- https://github.com/opencast/opencast/commit/c36652250a026afb7cf78b663950c702669f1d3f
- https://github.com/opencast/opencast/commit/ff84128c9b3bcbd79c28192d25929dab8faf185f
- https://github.com/opencast/opencast/releases/tag/19.7
- https://github.com/opencast/opencast/releases/tag/20.2
- https://github.com/opencast/opencast/security/advisories/GHSA-6f53-jp7x-gg7p
- https://github.com/opencast/opencast/security/advisories/GHSA-6f53-jp7x-gg7p
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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