CVE-2021-21672: Seleniumhtmlreport XXE Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-hxxp-6546-wv6r
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CVSS 4.3
CWE-611
Published
Advisory Summary

CVE-2021-21672 is a MODERATE (CVSS 4.3) xxe vulnerability vulnerability (CWE-611: Improper Restriction of XML External Entity Reference) affecting Seleniumhtmlreport libraries in the Maven ecosystem. The issue involves xxe vulnerability in jenkins selenium html report plugin. Remediation is available by upgrading affected packages to version 1.1.

CVE-2021-21672 at a Glance

CVE Identifier CVE-2021-21672
GHSA Identifier GHSA-hxxp-6546-wv6r
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-611: Improper Restriction of XML External Entity Reference
Affected Product Seleniumhtmlreport
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

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:N/S:U/C:L/I:N/A:N).

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

How to Fix CVE-2021-21672

To remediate this vulnerability, upgrade all affected Seleniumhtmlreport 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:seleniumhtmlreport fixed: 1.1 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>seleniumhtmlreport</artifactId>
    <version>1.1</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-2021-21672, 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 Seleniumhtmlreport in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.1), 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-611: Improper Restriction of XML External Entity Reference, where the product processes an xml document that can contain xml entities with uris that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. In Seleniumhtmlreport, 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

Jenkins Selenium HTML report Plugin 1.0 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks. This allows attackers with the ability to control the report files parsed using this plugin to have Jenkins parse a crafted report file that uses external entities for extraction of secrets from the Jenkins controller or server-side request forgery. Jenkins Selenium HTML report Plugin 1.1 disables external entity resolution for its XML parser.

CVE-2021-21672 Affected Seleniumhtmlreport Versions

1 component(s)
Fixed Versions:
1.1
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:seleniumhtmlreport
maven/org.jenkins-ci.plugins/seleniumhtmlreport
Maven
< 1.1
1.1

References

NVD — CVE-2021-21672 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21672
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/seleniumhtmlreport-plugin/commit/5ca59b8c7d23af4450dc7f19c1b4107d59063ae1
Seleniumhtmlreport Source Repository REPOSITORY
https://github.com/jenkinsci/seleniumhtmlreport-plugin
Seleniumhtmlreport Security Information SECURITY
https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2329
Seleniumhtmlreport Security Information SECURITY
http://www.openwall.com/lists/oss-security/2021/06/30/1
Seleniumhtmlreport Security Information SECURITY
http://www.openwall.com/lists/oss-security/2022/04/14/2

Frequently Asked Questions

What is CVE-2021-21672?
CVE-2021-21672 is a security vulnerability in Seleniumhtmlreport involving XXE vulnerability in Jenkins Selenium HTML report Plugin under CWE-611: Improper Restriction of XML External Entity Reference.
Which Seleniumhtmlreport versions are affected?
Affected versions include releases prior to 1.1 across affected packages: org.jenkins-ci.plugins:seleniumhtmlreport.
What version fixes CVE-2021-21672?
Upgrading to 1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is seleniumhtmlreport affected?
Yes, org.jenkins-ci.plugins:seleniumhtmlreport is affected in releases prior to 1.1. Upgrade your dependency to 1.1 or later.
What is the CVSS score of CVE-2021-21672?
CVE-2021-21672 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2021-21672?
CVE-2021-21672 is classified under CWE-611: Improper Restriction of XML External Entity Reference (The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.).
How can I check Maven dependencies for CVE-2021-21672?
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-hxxp-6546-wv6r",
  "modified" : "2023-10-27T15:58:03Z",
  "published" : "2021-07-02T18:36:13Z",
  "aliases" : [ "CVE-2021-21672" ],
  "summary" : "XXE vulnerability in Jenkins Selenium HTML report Plugin",
  "details" : "Jenkins Selenium HTML report Plugin 1.0 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.\n\nThis allows attackers with the ability to control the report files parsed using this plugin to have Jenkins parse a crafted report file that uses external entities for extraction of secrets from the Jenkins controller or server-side request forgery.\n\nJenkins Selenium HTML report Plugin 1.1 disables external entity resolution for its XML parser.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:seleniumhtmlreport"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.0"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-21672"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/seleniumhtmlreport-plugin/commit/5ca59b8c7d23af4450dc7f19c1b4107d59063ae1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/seleniumhtmlreport-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2329"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2021/06/30/1"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2022/04/14/2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-611" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-07-01T20:14:49Z",
    "nvd_published_at" : "2021-06-30T17:15:00Z"
  }
}