CVE-2020-5231

Public Exploit
Opencast users with ROLE_COURSE_ADMIN can create new users

Description

In Opencast before 7.6 and 8.1, users with the role ROLE_COURSE_ADMIN can use the user-utils endpoint to create new users not including the role ROLE_ADMIN. ROLE_COURSE_ADMIN is a non-standard role in Opencast which is referenced neither in the documentation nor in any code (except for tests) but only in the security configuration. From the name – implying an admin for a specific course – users would never expect that this role allows user creation. This issue is fixed in 7.6 and 8.1 which both ship a new default security configuration.

Categories

4.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.23%
Third-Party Advisory github.com
Affected: opencast opencast
Published at:
Updated at:

References

Link Tags
https://github.com/opencast/opencast/security/advisories/GHSA-94qw-r73x-j7hg third party advisory exploit
https://github.com/opencast/opencast/commit/72fad0031d8a82c860e2bde0b27570c5042320ee patch

Frequently Asked Questions

What is the severity of CVE-2020-5231?
CVE-2020-5231 has been scored as a medium severity vulnerability.
How to fix CVE-2020-5231?
To fix CVE-2020-5231, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-5231 being actively exploited in the wild?
It is possible that CVE-2020-5231 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-5231?
CVE-2020-5231 affects opencast opencast.
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