CVE-2021-21687
CRITICALCVSS 9.1/10EPSS 1.34%
Last modified
CVE-2021-21687 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create symbolic links when unarchiving a symbolic link in FilePath#untar.. EPSS estimates a 1.34% chance of exploitation in the next 30 days.
Description
Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create symbolic links when unarchiving a symbolic link in FilePath#untar.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jenkins | Jenkins | < 2.303.3 |
| Jenkins | Jenkins | < 2.319 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-21687?
Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create symbolic links when unarchiving a symbolic link in FilePath#untar.
How severe is CVE-2021-21687?
CVE-2021-21687 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.34% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21687?
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
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- 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.
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Are you affected by CVE-2021-21687?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST