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    CVE-2021-43807

    Opencast is an Open Source Lecture Capture & Video Management for Education. Opencast versions prior to 9.10 allow HTTP method spoofing, allowing to change the assumed HTTP method via URL parameter. This allows attackers to turn HTTP GET requests into PUT requests or an HTTP form to send DELETE requests. This bypasses restrictions otherwise put on these types of requests and aids in cross-site request forgery (CSRF) attacks, which would otherwise not be possible. The vulnerability allows attackers to craft links or forms which may change the server state. This issue is fixed in Opencast 9.10 and 10.0. You can mitigate the problem by setting the `SameSite=Strict` attribute for your cookies. If this is a viable option for you depends on your integrations. We strongly recommend updating in any case.

    Published:Dec 14, 2021
    Last Modified:Nov 21, 2024
    EPS:Dec 14, 2021
    EPSS Score:0.00389
    CVSS Score:7.5

    Affected Products

    Vendor
    Apereo
    Product
    Opencast

    Exploits

    https://github.com/opencast/opencast/security/advisories/GHSA-j4mm-7pj3-jf7vhttps://github.com/opencast/opencast/security/advisories/GHSA-j4mm-7pj3-jf7v

    Related CVEs

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    CVE-2025-54380 (CVSS 6.5) — Opencast is a free, open-source platform to support the management of educational audio and video content. Pri…
    CVE-2024-52797 (CVSS 6.5) — Opencast is free and open source software for automated video capture and distribution. First noticed in Openc…
    CVE-2018-16153 (CVSS 7.5) — An issue was discovered in Apereo Opencast 4.x through 10.x before 10.6. It sends system digest credentials du…
    CVE-2022-41965 (CVSS 5.7) — Opencast is a free, open-source platform to support the management of educational audio and video content. Pri…
    CVE-2022-29237 (CVSS 5.4) — Opencast is a free and open source solution for automated video capture and distribution at scale. Prior to Op…
    CVE-2021-43821 (CVSS 9.9) — Opencast is an Open Source Lecture Capture & Video Management for Education. Opencast before version 9.10 or 1…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High