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MEDIUM severity

CVE-2017-1000221 — opencast-kernel

MEDIUMFix: opencast/opencast@f1abcaf

CVE-2017-1000221 is a medium-severity (CVSS 6.5) CWE-732 vulnerability in org.opencastproject:opencast-kernel. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for org.opencastproject:opencast-kernel — see the affected versions and patch details below.

Opencast has Incorrect Permission Assignment

Also known asGHSA-hx44-c87v-p6xg
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs56th percentile — riskier than 56% of all scored CVEsHighest risk
0.00%0.42%0.84%1.26%0.2%0.8%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕org.opencastproject:opencast-kernel

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

In Opencast 2.2.3 and older if user names overlap, the Opencast search service used for publication to the media modules and players will handle the access control incorrectly so that users only need to match part of the user name used for the access restriction. For example, a user with the role ROLE_USER will have access to recordings published only for ROLE_USER_X.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.opencastproject:opencast-kernelall versions2.2.4org.opencastproject:opencast-kernel:2.2.4

Affected Products

1 product · 1 configurations
Application
opencastapereo
≤ 2.2.3
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

In Opencast 2.2.3 and older if user names overlap, the Opencast search s…

opencast.jira.comNVDOct 2019

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.opencastproject:opencast-kernel, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.opencastproject:opencast-kernel to 2.2.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-1000221 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

In Opencast 2.2.3 and older if user names overlap, the Opencast search service used for publication to the media modules and players will handle the access control incorrectly so that users only need to match part of the user name used for the access restriction. For example, a user with the role ROLE_USER will have access to recordings published only for ROLE_USER_X.
O3 Security · Impact-Aware SCA

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CVE-2017-1000221: opencast-kernel — Fixed in 2.2.4