CVE-2020-2207
Reflected XSS vulnerability in Jenkins VncViewer Plugin
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2020-2207- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2020-2207- Updated
- 2026-11-02
EUVDEUVD-2022-1998 No score
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.
- Record
EUVD-2022-1998- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-2j4h-cjgh-659v
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.
- Record
GHSA-2j4h-cjgh-659v- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2020-2207- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-2j4h-cjgh-659v
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.
- Record
GHSA-2j4h-cjgh-659v- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.jenkins-ci.plugins:vncviewerMaven |
through 1.7 | 1.8 |
org.jenkins-ci.plugins:vncviewerMaven |
before 1.8, plus listed versions 1.01.11.21.31.51.7 |
1.8 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-2207 is a medium vulnerability (CVSS 6.1) in Jenkins Vncviewer, published July 2, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.87%, the 59th percentile. Fixed in org.jenkins-ci.plugins:vncviewer 1.8.