CVE-2021-21673
Open redirect vulnerability in Jenkins CAS Plugin
6.1
MEDIUM
CVSS 3.1
EPSS 0.08%
Description
Jenkins CAS Plugin 1.6.0 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins. This allows attackers to perform phishing attacks by having users go to a Jenkins URL that will forward them to a different site after successful authentication. Jenkins CAS Plugin 1.6.1 only redirects to relative (Jenkins) URLs.
How to fix CVE-2021-21673
To remediate CVE-2021-21673, upgrade the affected package to a fixed version below.
- —upgrade to 1.6.1 or later
Is CVE-2021-21673 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.6.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |