CVE-2023-25763: Email ext Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-h97r-fchm-m23x
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2023-25763 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Email ext libraries in the Maven ecosystem. The issue involves cross-site scripting in jenkins email extension plugin. Remediation is available by upgrading affected packages to version 2.94.

CVE-2023-25763 at a Glance

CVE Identifier CVE-2023-25763
GHSA Identifier GHSA-h97r-fchm-m23x
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 Email ext
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:3.1/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-2023-25763

To remediate this vulnerability, upgrade all affected Email ext 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:email-ext fixed: 2.94 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>email-ext</artifactId>
    <version>2.94</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-2023-25763, 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 Email ext in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.94), 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 Email ext, 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 Email Extension Plugin 2.93 and earlier does not escape various fields included in bundled email templates, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to control affected fields.

CVE-2023-25763 Affected Email ext Versions

1 component(s)
Fixed Versions:
2.94
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:email-ext
maven/org.jenkins-ci.plugins/email-ext
Maven
< 2.94
2.94

References

NVD — CVE-2023-25763 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-25763
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/email-ext-plugin/commit/ebfb97475ec6491f28b88a8b5acbb99ff36f4d7f
Email ext Source Repository REPOSITORY
https://github.com/jenkinsci/email-ext-plugin
Email ext Security Information SECURITY
https://www.jenkins.io/security/advisory/2023-02-15/#SECURITY-2931
Email ext Security Information SECURITY
http://www.openwall.com/lists/oss-security/2023/02/15/4

Frequently Asked Questions

What is CVE-2023-25763?
CVE-2023-25763 is a security vulnerability in Email ext involving Cross-site Scripting in Jenkins Email Extension Plugin under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Email ext versions are affected?
Affected versions include releases prior to 2.94 across affected packages: org.jenkins-ci.plugins:email-ext.
What version fixes CVE-2023-25763?
Upgrading to 2.94 (or the latest patched release for your respective branch) resolves the vulnerability.
Is email-ext affected?
Yes, org.jenkins-ci.plugins:email-ext is affected in releases prior to 2.94. Upgrade your dependency to 2.94 or later.
What is the CVSS score of CVE-2023-25763?
CVE-2023-25763 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2023-25763?
CVE-2023-25763 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-2023-25763?
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-h97r-fchm-m23x",
  "modified" : "2023-02-23T21:31:31Z",
  "published" : "2023-02-15T15:30:41Z",
  "aliases" : [ "CVE-2023-25763" ],
  "summary" : "Cross-site Scripting in Jenkins Email Extension Plugin",
  "details" : "Jenkins Email Extension Plugin 2.93 and earlier does not escape various fields included in bundled email templates, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to control affected fields.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:email-ext"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.94"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.93"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-25763"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/email-ext-plugin/commit/ebfb97475ec6491f28b88a8b5acbb99ff36f4d7f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/email-ext-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2023-02-15/#SECURITY-2931"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2023/02/15/4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-02-15T18:29:54Z",
    "nvd_published_at" : "2023-02-15T14:15:00Z"
  }
}