What is CVE-2020-2205?

CVE-2020-2205 is a medium-severity vulnerability in Jenkins Vncrecorder, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2020-07-02.

How severe is CVE-2020-2205?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Jenkins Vncrecorder

CVE-2020-2205

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-07-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.6th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Jenkins Vncrecorder
Jenkins Project Vncrecorder Plugin — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

jenkins.io/security/advisory/2020-07-02/ (Vendor Advisory)
www.openwall.com/lists/oss-security/2020/07/02/7 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-2205?: CVE-2020-2205 is a medium-severity vulnerability in Jenkins Vncrecorder, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2020-07-02.
How severe is CVE-2020-2205?: Medium severity. CVSS v3 base score is 4.8 out of 10.