Stored XSS vulnerability in Jenkins VncRecorder Plugin

MEDIUM 4.8CVE-2020-2205 · GHSA-vqp8-h53h-3jfh · Published 02/07/2020 · updated 17/06/2026

In short

CVE-2020-2205 is a MEDIUM (CVSS 4.8) vulnerability affecting org.jenkins-ci.plugins:vncrecorder, vncrecorder (jenkins).
Chance of exploitation in the next 30 days (EPSS): 0.70%, higher than 53.4% of all vulnerabilities.
Fix: update to 1.35 or later.

Package	Affected versions	Patched versions
org.jenkins-ci.plugins:vncrecorder Maven	`< 1.35`	`1.35`
vncrecorder jenkins	`≤ 1.25`	No fix yet

Description

VncRecorder Plugin 1.25 and earlier does not escape a tool path in the checkVncServ form validation endpoint accessed e.g. via job configuration forms.

This results in a stored cross-site scripting (XSS) vulnerability exploitable by Jenkins administrators.

VncRecorder Plugin 1.35 escapes the tool path.

NVD description

Jenkins VncRecorder Plugin 1.25 and earlier does not escape a tool path in the `checkVncServ` form validation endpoint, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by Jenkins administrators.

References

nvd.nist.gov/vuln/detail/CVE-2020-2205 · ADVISORY
jenkinsci/vncrecorder-plugin · PACKAGE
jenkins.io/security/advisory/2020-07-02 · WEB
openwall.com/lists/oss-security/2020/07/02/7 · WEB
jenkins.io/security/advisory/2020-07-02 · Vendor Advisory

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Package

Affected versions

Patched versions

org.jenkins-ci.plugins:vncrecorder

Maven

< 1.35

1.35

vncrecorder

jenkins

≤ 1.25

No fix yet

Description

VncRecorder Plugin 1.25 and earlier does not escape a tool path in the checkVncServ form validation endpoint accessed e.g. via job configuration forms.

This results in a stored cross-site scripting (XSS) vulnerability exploitable by Jenkins administrators.

VncRecorder Plugin 1.35 escapes the tool path.

NVD description