CVE-2024-42467Public exploitNetwork attack vector

Internal service access and XSS via unrestricted proxy

Published Aug 9, 2024 · Updated Aug 5, 2026

SSRF and XSS in openHAB WebUI 3.4.0.M4 through 4.2.0 allow remote attackers to access internal services through the CometVisu proxy. ProxyResource accepts an arbitrary url parameter, sends a GET request to that URI, and returns its body and content type without an allowlist. Direct SSRF requires a non-private deployment; the XSS path requires a user to open a crafted proxy link, allowing same-origin script access to local openHAB endpoints.

CVSS severity10.0
Critical
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF and XSS in openHAB WebUI 3.4.0.M4 through 4.2.0 allow remote attackers to access internal services through the CometVisu proxy. ProxyResource accepts an arbitrary url parameter, sends a GET request to that URI, and returns its body and content type without an allowlist. Direct SSRF requires a non-private deployment; the XSS path requires a user to open a crafted proxy link, allowing same-origin script access to local openHAB endpoints.

The record

CVE
CVE-2024-42467
Published
Aug 9, 2024
Updated
Aug 5, 2026
Vendor
openHAB
Product
openHAB WebUI
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.2.1
  2. Affected versionversion=>= 3.4.0.M4, < 4.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

openHAB · openHAB WebUIversion=0 <4.2.1; version=>= 3.4.0.M4, < 4.2.1

Published CVSS scores

10.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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