Medium severity · published Jan 30, 2020
CVE-2020-5231
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
6.5
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
Opencast · Apereo
before 7.6; 8.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5231
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-5231
Patch
https://github.com/opencast/opencast/commit/72fad0031d8a82c860e2bde0b27570c5042320ee
Exploit
https://github.com/opencast/opencast/security/advisories/GHSA-94qw-r73x-j7hg
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