CVE-2020-2227: Deployer framework Cross-Site Scripting Vulnerability

HIGH
Advisory Identifier: GHSA-cfvw-84vq-43mx
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CVSS 8.0
CWE-79
Published
Advisory Summary

CVE-2020-2227 is a HIGH (CVSS 8.0) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Deployer framework libraries in the Maven ecosystem. The issue involves stored xss vulnerability in jenkins deployer framework plugin. Remediation is available by upgrading affected packages to version 1.3.

CVE-2020-2227 at a Glance

CVE Identifier CVE-2020-2227
GHSA Identifier GHSA-cfvw-84vq-43mx
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 Deployer framework
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-2020-2227

To remediate this vulnerability, upgrade all affected Deployer framework 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.jenkins-ci.plugins:deployer-framework fixed: 1.3 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>deployer-framework</artifactId>
    <version>1.3</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.jenkins-ci.plugins

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2020-2227, inspect your build dependencies using the Maven Dependency Plugin:

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

Analyze the terminal output to locate any version of Deployer framework in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.3), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jenkins-ci.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 Deployer framework, 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

Deployer Framework Plugin is a framework plugin allowing other plugins to provide a way to deploy artifacts. Deployer Framework Plugin 1.2 and earlier does not escape the URL displayed in the build home page. This results in a stored cross-site scripting (XSS) vulnerability exploitable by users able to provide the location. The exploitability of this vulnerability depends on the specific implementation using Deployer Framework Plugin. The Jenkins security team is not aware of any exploitable implementation. Deployer Framework Plugin 1.3 escapes the URL.

CVE-2020-2227 Affected Deployer framework Versions

1 component(s)
Fixed Versions:
1.3
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:deployer-framework
maven/org.jenkins-ci.plugins/deployer-framework
Maven
< 1.3
1.3

References

NVD — CVE-2020-2227 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-2227
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/deployer-framework-plugin/commit/8fa2e16bce85ec1b93be60102d7cfb5153876e83
Deployer framework Source Repository REPOSITORY
https://github.com/jenkinsci/deployer-framework-plugin
Deployer framework Security Information SECURITY
https://jenkins.io/security/advisory/2020-07-15/#SECURITY-1915
Deployer framework Security Information SECURITY
http://www.openwall.com/lists/oss-security/2020/07/15/5

Frequently Asked Questions

What is CVE-2020-2227?
CVE-2020-2227 is a security vulnerability in Deployer framework involving Stored XSS vulnerability in Jenkins Deployer Framework Plugin under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Deployer framework versions are affected?
Affected versions include releases prior to 1.3 across affected packages: org.jenkins-ci.plugins:deployer-framework.
What version fixes CVE-2020-2227?
Upgrading to 1.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is deployer-framework affected?
Yes, org.jenkins-ci.plugins:deployer-framework is affected in releases prior to 1.3. Upgrade your dependency to 1.3 or later.
What is the CVSS score of CVE-2020-2227?
CVE-2020-2227 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-2020-2227?
CVE-2020-2227 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-2020-2227?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jenkins-ci.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-cfvw-84vq-43mx",
  "modified" : "2022-12-28T23:43:56Z",
  "published" : "2022-05-24T17:23:39Z",
  "aliases" : [ "CVE-2020-2227" ],
  "summary" : "Stored XSS vulnerability in Jenkins Deployer Framework Plugin",
  "details" : "Deployer Framework Plugin is a framework plugin allowing other plugins to provide a way to deploy artifacts. Deployer Framework Plugin 1.2 and earlier does not escape the URL displayed in the build home page. This results in a stored cross-site scripting (XSS) vulnerability exploitable by users able to provide the location.\n\nThe exploitability of this vulnerability depends on the specific implementation using Deployer Framework Plugin. The Jenkins security team is not aware of any exploitable implementation.\n\nDeployer Framework Plugin 1.3 escapes the URL.",
  "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" : "org.jenkins-ci.plugins:deployer-framework"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.2"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-2227"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/deployer-framework-plugin/commit/8fa2e16bce85ec1b93be60102d7cfb5153876e83"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/deployer-framework-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2020-07-15/#SECURITY-1915"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2020/07/15/5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-28T23:43:56Z",
    "nvd_published_at" : "2020-07-15T18:15:00Z"
  }
}