CVE-2026-77614

8.8 HIGHpublic exploit available

Published 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, enabling session hijacking and potential full administrative access.
Exploitability: Exploitation requires sending a crafted link to a victim with no active session cookie; the attacker must wait for the victim to authenticate.
Blast radius: If exploited, this can lead to unauthorized access to sensitive data and actions, including possible full administrative account takeover.
Prioritized remediation: Update Opencast to version 19.7 or later to mitigate the vulnerability.

auth-bypasswebsession-hijackingadmin-takeover

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

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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