---
id: CVE-2024-42467
title: >-
  openHAB, a provider of open-source home automation software, has add-ons
  including the visualization add-on CometVisu
summary: >-
  openHAB, a provider of open-source home automation software, has add-ons
  including the visualization add-on CometVisu. In versions 3.4.0.M4 through
  4.2.0,, the proxy endpoint of openHAB's CometVisu add-on can be accessed
  without authenti…
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-918
vendor: openhab
product: openhab_web_interface
affected:
  - openhab_web_interface < 4.2.1
patched:
  - openhab_web_interface 4.2.1
published: '2024-08-12'
updated: '2026-08-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-42467'
references:
  - url: >-
      https://github.com/openhab/openhab-webui/blob/1c03c60f84388b9d7da0231df2d4ebb1e17d3fcf/bundles/org.openhab.ui.cometvisu/src/main/java/org/openhab/ui/cometvisu/internal/backend/rest/ProxyResource.java#L83
    label: security-advisories@github.com
  - url: >-
      https://github.com/openhab/openhab-webui/commit/531dabfa8311a50d2e740bf4f2b4f2400e78646c#diff-b9a920cefe5f9b2ee3615cb29f88bcad0535012c2ae2535bd12e47d6d9395b6a
    label: security-advisories@github.com
  - url: >-
      https://github.com/openhab/openhab-webui/commit/630e8525835c698cf58856aa43782d92b18087f2
    label: security-advisories@github.com
  - url: >-
      https://github.com/openhab/openhab-webui/security/advisories/GHSA-v7gr-mqpj-wwh3
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.01035
epssPercentile: 0.62385
ingestedAt: '2026-08-05T16:49:28.087Z'
---

## Overview

openHAB, a provider of open-source home automation software, has add-ons including the visualization add-on CometVisu. In versions 3.4.0.M4 through 4.2.0,, the proxy endpoint of openHAB's CometVisu add-on can be accessed without authentication. This proxy-feature can be exploited as Server-Side Request Forgery (SSRF) to induce GET HTTP requests to internal-only servers, in case openHAB is exposed in a non-private network. Furthermore, this proxy-feature can also be exploited as a Cross-Site Scripting (XSS) vulnerability, as an attacker is able to re-route a request to their server and return a page with malicious JavaScript code. Since the browser receives this data directly from the openHAB CometVisu UI, this JavaScript code will be executed with the origin of the CometVisu UI. This allows an attacker to exploit call endpoints on an openHAB server even if the openHAB server is located in a private network. (e.g. by sending an openHAB admin a link that proxies malicious JavaScript.) This issue may lead up to Remote Code Execution (RCE) when chained with other vulnerabilities. Users should upgrade to version 4.2.1 of the CometVisu add-on of openHAB to receive a patch.

## Affected

- `openhab_web_interface < 4.2.1`

## Remediation

Upgrade past the affected range:

- `openhab_web_interface 4.2.1`