CVE-2020-26234: apereo opencast Origin Validation Error
Vulnerability summary
CVE-2020-26234 is a medium (CVSS 4.8) Origin Validation Error vulnerability in apereo opencast. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19.1% of scored vulnerabilities.
Timeline
- 08-12-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Opencast before versions 8.9 and 7.9 disables HTTPS hostname verification of its HTTP client used for a large portion of Opencast's HTTP requests. Hostname verification is an important part when using HTTPS to ensure that the presented certificate is valid for the host. Disabling it can allow for man-in-the-middle attacks. This problem is fixed in Opencast 7.9 and Opencast 8.8 Please be aware that fixing the problem means that Opencast will not simply accept any self-signed certificates any longer without properly importing them. If you need those, please make sure to import them into the Java key store. Better yet, get a valid certificate.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · MavenEcosystem advisory · calculated4.8MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
- NVDNIST4.8MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
EPSS trend
Probability
0.28%
Chance of exploitation in the next 30 days
Percentile
19%
Versus all other CVEs
30-day change
0.00 pp
From 0.28% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Apereo1 product
- opencast< 7.9 | ≥ 8.0, < 8.9
Opencast1 product
- opencast< 7.9 | ≥ 8.0, < 8.9
Org.opencastproject1 product
- opencast-kernel< 7.9 | ≥ 8.0, < 8.9
3 vendors · 3 products
References
3 links- github.com/opencast/opencast/security/advisories/GHSA-44cw-p2hm-gpf6X Refsource CONFIRMWEBThird Party Advisory
- github.com/opencast/opencast/commit/4225bf90af74557deaf8fb6b80b0705c9621acfcX Refsource MISCWEBPatchThird Party Advisory
