CVE-2018-1000202: Groovy postbuild Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-38ch-x695-m794
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2018-1000202 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Groovy postbuild libraries in the Maven ecosystem. The issue involves jenkins groovy postbuild plugin vulnerable to cross-site scripting. Remediation is available by upgrading affected packages to version 2.4.

CVE-2018-1000202 at a Glance

CVE Identifier CVE-2018-1000202
GHSA Identifier GHSA-38ch-x695-m794
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Groovy postbuild
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2018-1000202

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

org.jvnet.hudson.plugins:groovy-postbuild fixed: 2.4 
<dependency>
    <groupId>org.jvnet.hudson.plugins</groupId>
    <artifactId>groovy-postbuild</artifactId>
    <version>2.4</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=org.jvnet.hudson.plugins

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2018-1000202, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jvnet.hudson.plugins

Analyze the terminal output to locate any version of Groovy postbuild in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.4), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jvnet.hudson.plugins 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 Groovy postbuild, 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

A persisted cross-site scripting vulnerability exists in Jenkins Groovy Postbuild Plugin 2.3.1 and older in various Jelly files that allows attackers able to control build badge content to define JavaScript that would be executed in another user's browser when that other user performs some UI actions.

CVE-2018-1000202 Affected Groovy postbuild Versions

1 component(s)
Fixed Versions:
2.4
Product / Package Ecosystem Affected Versions Fixed Version
org.jvnet.hudson.plugins:groovy-postbuild
maven/org.jvnet.hudson.plugins/groovy-postbuild
Maven
< 2.4
2.4

References

NVD — CVE-2018-1000202 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1000202
Groovy postbuild Security Information SECURITY
https://jenkins.io/security/advisory/2018-05-09/#SECURITY-821

Frequently Asked Questions

What is CVE-2018-1000202?
CVE-2018-1000202 is a security vulnerability in Groovy postbuild involving Jenkins Groovy Postbuild Plugin vulnerable to Cross-site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Groovy postbuild versions are affected?
Affected versions include releases prior to 2.4 across affected packages: org.jvnet.hudson.plugins:groovy-postbuild.
What version fixes CVE-2018-1000202?
Upgrading to 2.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is groovy-postbuild affected?
Yes, org.jvnet.hudson.plugins:groovy-postbuild is affected in releases prior to 2.4. Upgrade your dependency to 2.4 or later.
What is the CVSS score of CVE-2018-1000202?
CVE-2018-1000202 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2018-1000202?
CVE-2018-1000202 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-2018-1000202?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jvnet.hudson.plugins'. 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-38ch-x695-m794",
  "modified" : "2022-11-22T19:45:11Z",
  "published" : "2022-05-14T03:13:13Z",
  "aliases" : [ "CVE-2018-1000202" ],
  "summary" : "Jenkins Groovy Postbuild Plugin vulnerable to Cross-site Scripting",
  "details" : "A persisted cross-site scripting vulnerability exists in Jenkins Groovy Postbuild Plugin 2.3.1 and older in various Jelly files that allows attackers able to control build badge content to define JavaScript that would be executed in another user's browser when that other user performs some UI actions.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jvnet.hudson.plugins:groovy-postbuild"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.3.1"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1000202"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2018-05-09/#SECURITY-821"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-11-22T19:45:11Z",
    "nvd_published_at" : "2018-06-05T21:29:00Z"
  }
}