CVE-2020-2259: Computer queue plugin Cross-Site Scripting Vulnerability

HIGH
Advisory Identifier: GHSA-qg66-xv7v-m834
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CVSS 8.0
CWE-79
Published
Advisory Summary

CVE-2020-2259 is a HIGH (CVSS 8.0) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Computer queue plugin libraries in the Maven ecosystem. The issue involves stored xss vulnerability in computer-queue-plugin plugin. Remediation is available by upgrading affected packages to version 1.6.

CVE-2020-2259 at a Glance

CVE Identifier CVE-2020-2259
GHSA Identifier GHSA-qg66-xv7v-m834
Severity HIGH
CVSS v3.1 Base Score 8.0
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Computer queue plugin
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2020-2259

To remediate this vulnerability, upgrade all affected Computer queue plugin dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

jenkins.ci.plugins.computerqueue:computer-queue-plugin fixed: 1.6 
<dependency>
    <groupId>jenkins.ci.plugins.computerqueue</groupId>
    <artifactId>computer-queue-plugin</artifactId>
    <version>1.6</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=jenkins.ci.plugins.computerqueue

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2020-2259, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=jenkins.ci.plugins.computerqueue

Analyze the terminal output to locate any version of Computer queue plugin in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.6), your application is affected.

Note: The mvn dependency:tree -Dincludes=jenkins.ci.plugins.computerqueue command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Computer queue plugin, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

computer-queue-plugin Plugin 1.5 and earlier does not escape the agent name in tooltips. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Agent/Configure permission. computer-queue-plugin Plugin 1.6 escapes the agent name in tooltips.

CVE-2020-2259 Affected Computer queue plugin Versions

1 component(s)
Fixed Versions:
1.6
Product / Package Ecosystem Affected Versions Fixed Version
jenkins.ci.plugins.computerqueue:computer-queue-plugin
maven/jenkins.ci.plugins.computerqueue/computer-queue-plugin
Maven
< 1.6
1.6

References

NVD — CVE-2020-2259 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-2259
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/computer-queue-plugin/commit/38776c0716470038d922829f675ab278a079acfb
Computer queue plugin Source Repository REPOSITORY
https://github.com/jenkinsci/computer-queue-plugin
Computer queue plugin Security Information SECURITY
https://www.jenkins.io/security/advisory/2020-09-16/#SECURITY-1912
Computer queue plugin Security Information SECURITY
http://www.openwall.com/lists/oss-security/2020/09/16/3

Frequently Asked Questions

What is CVE-2020-2259?
CVE-2020-2259 is a security vulnerability in Computer queue plugin involving Stored XSS vulnerability in computer-queue-plugin Plugin under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Computer queue plugin versions are affected?
Affected versions include releases prior to 1.6 across affected packages: jenkins.ci.plugins.computerqueue:computer-queue-plugin.
What version fixes CVE-2020-2259?
Upgrading to 1.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is computer-queue-plugin affected?
Yes, jenkins.ci.plugins.computerqueue:computer-queue-plugin is affected in releases prior to 1.6. Upgrade your dependency to 1.6 or later.
What is the CVSS score of CVE-2020-2259?
CVE-2020-2259 has a CVSS v3.1 base score of 8.0 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2020-2259?
CVE-2020-2259 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Maven dependencies for CVE-2020-2259?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=jenkins.ci.plugins.computerqueue'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qg66-xv7v-m834",
  "modified" : "2022-12-29T01:42:04Z",
  "published" : "2022-05-24T17:28:25Z",
  "aliases" : [ "CVE-2020-2259" ],
  "summary" : "Stored XSS vulnerability in computer-queue-plugin Plugin",
  "details" : "computer-queue-plugin Plugin 1.5 and earlier does not escape the agent name in tooltips.\n\nThis results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Agent/Configure permission.\n\ncomputer-queue-plugin Plugin 1.6 escapes the agent name in tooltips.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "jenkins.ci.plugins.computerqueue:computer-queue-plugin"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.6"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.5"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-2259"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/computer-queue-plugin/commit/38776c0716470038d922829f675ab278a079acfb"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/computer-queue-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2020-09-16/#SECURITY-1912"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2020/09/16/3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-29T01:42:04Z",
    "nvd_published_at" : "2020-09-16T14:15:00Z"
  }
}