Security readout for executives and security teams
This issue lets a malicious login redirect appear legitimate in Jenkins CAS Plugin 1.6.0 and earlier. The main business risk is credential or trust abuse through phishing after login, not direct server takeover based on the supplied sources. Exposure appears limited to Jenkins environments using Jenkins CAS Plugin 1.6.0 or earlier with CAS login enabled. The supplied sources do not identify core Jenkins, other plugins, or non-CAS deployments as affected. Handle in normal vulnerability remediation cadence, faster for internet-facing Jenkins or high-trust administrative environments. The likely harm is phishing-enabled account compromise, which can still affect build pipelines and deployment trust. Mitigation focus: Inventory Jenkins controllers for CAS Plugin usage and installed version.; Prioritize upgrade or remediation using Jenkins advisory guidance.; Warn administrators about unexpected post-login redirects until remediated..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-21673 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2387CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.