CVE-2021-21639
Last modified
CVE-2021-21639 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not validate the type of object created after loading the data submitted to the `config.xml` REST API endpoint of a node, allowing attackers with Computer/Configure permission to replace a node with one of a different type.. EPSS estimates a 2.73% chance of exploitation in the next 30 days.
Description
Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not validate the type of object created after loading the data submitted to the `config.xml` REST API endpoint of a node, allowing attackers with Computer/Configure permission to replace a node with one of a different type.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jenkins | Jenkins | <= 2.277.1 |
| Jenkins | Jenkins | <= 2.286 |
References
- http://www.openwall.com/lists/oss-security/2021/04/07/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/04/07/2Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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