How severe is CVE-2017-1000221?

CVE-2017-1000221 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-1000221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-1000221?

CVE-2017-1000221 affects Apereo Opencast. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-1000221?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-1000221 published?

CVE-2017-1000221 was published on 2017-11-17 and last updated on 2026-06-17.

CVE-2017-1000221

CVE-2017-1000221 is a medium-severity vulnerability in Apereo Opencast with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-732.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Apereo Opencast
Published: 2017-11-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2017-1000221?: 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.
How severe is CVE-2017-1000221?: CVE-2017-1000221 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-1000221 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-1000221?: CVE-2017-1000221 affects Apereo Opencast. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-1000221?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-1000221 published?: CVE-2017-1000221 was published on 2017-11-17 and last updated on 2026-06-17.

References

https://opencast.jira.com/browse/MH-11862

Affected products (1)

cpe:2.3:a:apereo:opencast:*:*:*:*:*:*:*:*

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