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CVE-2020-2206

CVE-2020-2206:
Reflected XSS vulnerability in Jenkins VncRecorder Plugin

6.1

CVSS Score
3.1

Basic Information

CVE ID
CVE-2020-2206
GHSA ID
GHSA-fq52-6cjf-jw59
EPSS Score
0.52482%
CWE
CWE-79
Published
5/24/2022
Updated
10/26/2023
KEV Status
No
Technology
TechnologyJava

Technical Details

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Package NameEcosystemVulnerable VersionsFirst Patched Version
org.jenkins-ci.plugins:vncrecordermaven<= 1.251.35

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability explicitly references the 'checkVncServ' form validation endpoint as the source of unescaped output. In Jenkins plugin development, form validation methods typically follow the 'doCheck[ParameterName]' naming convention (e.g., doCheckVncServ). The lack of output encoding in this method would directly enable the reflected XSS by returning user-supplied input without proper sanitization. The high confidence comes from the direct correlation between the documented vulnerability pattern and standard Jenkins plugin development practices.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

Vn*R**or**r Plu*in *.** *n* **rli*r *o*s not *s**p* * p*r*m*t*r v*lu* in t** `****kVn*S*rv` *orm v*li**tion *n*point output. T*is r*sults in * r**l**t** *ross-sit* s*riptin* (XSS) vuln*r**ility. Vn*R**or**r Plu*in *.** *s**p*s t** p*r*m*t*r v*lu* i

Reasoning

T** vuln*r**ility *xpli*itly r***r*n**s t** '****kVn*S*rv' *orm v*li**tion *n*point *s t** sour** o* un*s**p** output. In J*nkins plu*in **v*lopm*nt, *orm v*li**tion m*t*o*s typi**lly *ollow t** '*o****k[P*r*m*t*rN*m*]' n*min* *onv*ntion (*.*., *o***