Jenkins Security Advisory 2021-01-26
Affects Jenkins Core
CSIRTS triage
- What
- Multiple security vulnerabilities have been identified in Jenkins Core.
- Who is affected
- All deployments of Jenkins Core are affected.
- Urgency
- Remediation is necessary as vulnerabilities can lead to potential exploitation.
- Action
- Update to the latest version of Jenkins Core.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch Jenkins Core
Get an email when a new Jenkins Core advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://www.jenkins.io/security/advisory/2021-01-26/
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2021-216150.90% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 57% of all EPSS-scored CVEs.
- Moderate exploitation riskCVE-2021-216022.2% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 81% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2021-21615 | coverage & exploitation status | NVD · CVE.org |
| CVE-2021-21602 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownJenkins Security Advisory 2021-01-13jenkins
More from Jenkins Security Advisories
- unknownJenkins Security Advisory 2026-08-052026-08-05
- unknownJenkins Security Advisory 2026-06-242026-06-24
- unknownJenkins Security Advisory 2026-06-102026-06-10
- unknownJenkins Security Advisory 2026-05-272026-05-27
- unknownJenkins Security Advisory 2026-04-292026-04-29