Vulnerability · Published Nov 4, 2021 · Assigned by jenkins
CVE-2021-21686
High 8.1
In plain English
A high-severity security flaw in Jenkins from Jenkins project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.0% (higher than 81% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.1High
Exploit odds (30 days)2.0%top 19.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.jenkins-ci.main:jenkins-core | 2.303.3 | GHSA-4g38-hrm4-rg94 |
| Maven | org.jenkins-ci.main:jenkins-core | 2.319 | GHSA-4g38-hrm4-rg94 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Jenkins project | Jenkins | unspecified – through 2.318unspecified – through LTS 2.303.2 |
References
- https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455 x_refsource_CONFIRM