Reflected XSS vulnerability in Jenkins VncViewer Plugin
VncViewer Plugin 1.7 and earlier does not escape a parameter value in the checkVncServ form validation endpoint output.
This results in a reflected cross-site scripting (XSS) vulnerability.
VncViewer Plugin 1.8 escapes the parameter value in the output.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.jenkins-ci.plugins:vncviewer | < 1.8 | 1.8 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-2207
- https://github.com/jenkinsci/vncviewer-plugin/commit/99b2aa3ed0857ef35de9a3aca0b0c53add3b392d
- https://github.com/jenkinsci/vncviewer-plugin
- https://jenkins.io/security/advisory/2020-07-02/#SECURITY-1776
- http://www.openwall.com/lists/oss-security/2020/07/02/7
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- Java / Kotlin (Maven)
- Package
org.jenkins-ci.plugins:vncviewer- Disclosed
- 24.05.2022
- Updated
- 11.10.2026 11:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-2j4h-cjgh-659v - CC BY 4.0
Vulnerability history: org.jenkins-ci.plugins:vncviewer
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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