CVE-2020-2207 json
Reflected XSS vulnerability in Jenkins VncViewer Plugin
published 2020-07-02 6 y ago modified 2026-06-17 4 mo ago also GHSA-2j4h-cjgh-659v , EUVD-2022-1998
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
Summary
Jenkins VncViewer Plugin 1.7 and earlier does not escape a parameter value in the checkVncServ form validation endpoint, resulting in a reflected cross-site scripting (XSS) vulnerability.
Patch / fix
Exploit prediction
0.87% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.jenkins-ci.plugins:vncviewer | <1.8 |
1.8 |
Affected products
- Jenkins project Jenkins VncViewer Plugin
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/jenkinsci/vncviewer-plugin/commit/99b2aa3ed0857ef35de9a3aca0b0c53add3b392d
web
-
jenkins.io
/security/advisory/2020-07-02/#SECURITY-1776
web, vendor-advisory
-
openwall.com
/lists/oss-security/2020/07/02/7
mailing-list, web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-2207
advisory
-
github.com
/jenkinsci/vncviewer-plugin
package
Sources
- CVE List CVE-2020-2207
- GitHub Advisory GHSA-2j4h-cjgh-659v
- NVD CVE-2020-2207
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.