CVE-2023-37602: Opencms core Alkacon OpenCMS Arbitrary File Upload Vulnerability

MODERATE

Advisory Identifier: GHSA-ghg2-3w9x-9599

CVSS 6.1

Published 2023-07-20

Advisory Summary

CVE-2023-37602 is a MODERATE (CVSS 6.1) alkacon opencms arbitrary file upload vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Opencms core libraries in the Maven ecosystem. The issue involves alkacon opencms arbitrary file upload vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2023-37602 at a Glance

CVE Identifier CVE-2023-37602

GHSA Identifier GHSA-ghg2-3w9x-9599

Severity MODERATE

CVSS v3.1 Base Score 6.1

CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Product Opencms core

Package Ecosystem Maven

Published Date 2023-07-20

Last Updated 2023-07-31

Security Impact

CVSS: 6.1

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

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

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-2023-37602

To remediate this vulnerability, upgrade all affected Opencms core 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.opencms:opencms-core fixed: Latest secure release

<dependency>
    <groupId>org.opencms</groupId>
    <artifactId>opencms-core</artifactId>
    <version>Latest secure release</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.opencms

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2023-37602, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.opencms

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

Note: The mvn dependency:tree -Dincludes=org.opencms 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 Opencms core, 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

An arbitrary file upload vulnerability in the component /workplace#!explorer of Alkacon OpenCMS v15.0 allows attackers to execute arbitrary code via uploading a crafted PNG file.

CVE-2023-37602 Affected Opencms core Versions

1 component(s)

Product / Package	Ecosystem	Affected Versions	Fixed Version
org.opencms:opencms-core maven/org.opencms/opencms-core	Maven	≤ 15.0

References

NVD — CVE-2023-37602 NVD

https://nvd.nist.gov/vuln/detail/CVE-2023-37602

Opencms core Source Repository REPOSITORY

https://github.com/alkacon/opencms-core

www.exploit-db.com/exploits/51564 WEB

https://www.exploit-db.com/exploits/51564

Frequently Asked Questions

What is CVE-2023-37602?

CVE-2023-37602 is a security vulnerability in Opencms core involving Alkacon OpenCMS arbitrary file upload vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').

Which Opencms core versions are affected?

Affected versions include releases prior to current release patches across affected packages: org.opencms:opencms-core.

What version fixes CVE-2023-37602?

Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.

Is opencms-core affected?

Yes, org.opencms:opencms-core is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.

What is the CVSS score of CVE-2023-37602?

CVE-2023-37602 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

What CWE is associated with CVE-2023-37602?

CVE-2023-37602 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-2023-37602?

Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.opencms'. 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-ghg2-3w9x-9599",
  "modified" : "2023-07-31T19:02:43Z",
  "published" : "2023-07-20T21:30:58Z",
  "aliases" : [ "CVE-2023-37602" ],
  "summary" : "Alkacon OpenCMS arbitrary file upload vulnerability",
  "details" : "An arbitrary file upload vulnerability in the component /workplace#!explorer of Alkacon OpenCMS v15.0 allows attackers to execute arbitrary code via uploading a crafted PNG file.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.opencms:opencms-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "15.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-37602"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/alkacon/opencms-core"
  }, {
    "type" : "WEB",
    "url" : "https://www.exploit-db.com/exploits/51564"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-21T20:22:12Z",
    "nvd_published_at" : "2023-07-20T19:15:10Z"
  }
}

CVSS V3

6.1 MODERATE