Security readout for executives and security teams
This Jenkins plugin flaw can let an attacker achieve remote code execution in affected Jenkins environments. The issue is in Code Coverage API Plugin 1.4.0 and earlier, which mishandles deserialized Java objects stored on disk. The source bundle does not provide a CVSS score, fixed version, or exploitation prerequisites. Exposure is limited to Jenkins controllers or environments with Jenkins Code Coverage API Plugin 1.4.0 or earlier installed. Prioritize internet-reachable Jenkins systems and systems where untrusted jobs, users, or integrations can affect stored build or coverage artifacts. Treat this as a high-priority Jenkins remediation item because it is a remote code execution issue in a CI/CD platform. Confirm whether the plugin is present, update or remove it, and prioritize systems that build production software or are externally reachable. Mitigation focus: Check the Jenkins advisory and plugin update center for vendor-fixed versions.; Upgrade Jenkins Code Coverage API Plugin according to Jenkins guidance.; Remove or disable the plugin if it is not operationally required..
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-21677 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/2021-08-31/#SECURITY-2376CVE 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.