CVE-2026-77614— Opencast: Session fixation in login enables account takeover via crafted link
Quick assessment
Affected
opencast opencast
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Opencast 是一个免费的开源平台，用于支持教育音频和视频内容的管理。在 19.7 和 20.2 版本之前，位于 的默认安全配置会接受客户端通过 URL 路径参数 指定的 JSESSIONID，并且在受害者登录时不会替换该会话 ID。未认证的攻击者可以向浏览器中没有活跃 Opencast 会话 Cookie 的受害者发送一个精心构造的链接，等待受害者完成认证后，再将该已知标识符作为受害者的已认证会话进行重用。这可能导致受害者数据和操作信息泄露；当受害者是管理员时，攻击者可实现完整的管理员账户接管。该问题已在 1
Possible ATT&CK Techniques 3 AI
T1537 · Transfer Data to Cloud Account T1557 · Adversary-in-the-Middle T1557.001 · Name Resolution Poisoning and SMB Relay
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I. Basic Information for CVE-2026-77614
Vulnerability Information
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Vulnerability Title
Opencast: Session fixation in login enables account takeover via crafted link
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
会话固定
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-77614
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-77614 (2)
Vendor Advisories for CVE-2026-77614 (1)
Vendor Pages for CVE-2026-77614 (2)
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🔗 Release Opencast 19.7 · opencast/opencast · GitHub x_refsource_MISC
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🔗 Release Opencast 20.2 · opencast/opencast · GitHub x_refsource_MISC
IV. Related Vulnerabilities
Same product: opencast
-
CVE-2025-61906
Opencast's editor accidentally publishes videos/overwrites p -
CVE-2025-61788
Opencast Paella Player 7 vulnerable to Cross-Site-Scripting -
CVE-2025-55202
Opencast has a partial path traversal vulnerability in UI co -
CVE-2025-54380
Opencast still publishes global system account credentials -
CVE-2024-52797
Searching Opencast may cause a denial of service
Same vendor: opencast
-
CVE-2025-61906
Opencast's editor accidentally publishes videos/overwrites p -
CVE-2025-61788
Opencast Paella Player 7 vulnerable to Cross-Site-Scripting -
CVE-2025-55202
Opencast has a partial path traversal vulnerability in UI co -
CVE-2025-54380
Opencast still publishes global system account credentials -
CVE-2024-52797
Searching Opencast may cause a denial of service
Same weakness: CWE-384
-
CVE-2026-92984
HUBzero CMS through 2.2.32 Session Fixation via Query-String -
CVE-2026-61592
djust: SSE sessions are not bound to the authenticated user; -
CVE-2026-69214
Http4s: CookieJar middleware accepts arbitrary Set-Cookie do -
CVE-2026-1758
Session Fixation -
CVE-2026-64857
tirreno has Session Fixation in Login Authentication
V. Comments for CVE-2026-77614
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