CVE-2021-21671
HIGHCVSS 7.5/10EPSS 1.71%
Last modified
CVE-2021-21671 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Jenkins 2.299 and earlier, LTS 2.289.1 and earlier does not invalidate the previous session on login.. EPSS estimates a 1.71% chance of exploitation in the next 30 days.
Description
Jenkins 2.299 and earlier, LTS 2.289.1 and earlier does not invalidate the previous session on login.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jenkins | Jenkins | >= 2.266, < 2.300 |
| Jenkins | Jenkins | >= 2.277.1, < 2.289.2 |
References
- http://www.openwall.com/lists/oss-security/2021/06/30/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/06/30/1Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-21671?
Jenkins 2.299 and earlier, LTS 2.289.1 and earlier does not invalidate the previous session on login.
How severe is CVE-2021-21671?
CVE-2021-21671 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.71% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21671?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-21666Jenkins Kiuwan Plugin 1.6.0 and earlier does not escape quer…6.1
- CVE-2021-21667Jenkins Scriptler Plugin 3.2 and earlier does not escape par…5.4
- CVE-2021-21668Jenkins Scriptler Plugin 3.1 and earlier does not escape scr…5.4
- CVE-2021-21669Jenkins Generic Webhook Trigger Plugin 1.72 and earlier does…9.8
- CVE-2021-2167Vulnerability in the Oracle Solaris product of Oracle System…7.8
- CVE-2021-21670Jenkins 2.299 and earlier, LTS 2.289.1 and earlier allows us…4.3
- CVE-2021-21672Jenkins Selenium HTML report Plugin 1.0 and earlier does not…4.3
- CVE-2021-21673Jenkins CAS Plugin 1.6.0 and earlier improperly determines t…6.1
- CVE-2021-21674A missing permission check in Jenkins requests-plugin Plugin…4.3
- CVE-2021-21675A cross-site request forgery (CSRF) vulnerability in Jenkins…6.5
- CVE-2021-21676Jenkins requests-plugin Plugin 2.2.7 and earlier does not pe…4.3
- CVE-2021-21677Jenkins Code Coverage API Plugin 1.4.0 and earlier does not …8.8
Are you affected by CVE-2021-21671?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST