🛡️ CVE-2023-0870 — horizon

🟠 CVSS 8.1 — High ✅ No Known Exploit CWE-352 NVD
8.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

OpenNMS Meridian and Horizon vulnerable to Cross-Site Request Forgery

A form can be manipulated with cross-site request forgery in multiple versions of OpenNMS Meridian and Horizon. This can potentially allow an attacker to gain access to confidential information and compromise integrity. The solution is to upgrade to Meridian 2023.1.1 or Horizon 31.0.6 or newer. Meridian and Horizon installation instructions state that they are intended for installation within an organization's private networks and should not be directly accessible from the Internet.

How this vulnerability can be exploited

This issue can be reached from an adjacent network, attack complexity is low, an attacker needs low-level privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability none.

Weakness class

CVE-2023-0870 is classified as CWE-352: Cross-Site Request Forgery (CSRF). A state-changing request is accepted without proof it was intended, so another site can trigger it using the victim's session.

Affected software

CVE-2023-0870 is recorded against 3 packages.

  • horizon (fixed in 31.0.6)
  • meridian
  • org.opennms:opennms-webapp (fixed in 31.0.6)

Timeline and source

Published on 22 March 2023 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

docs.opennms.com
github.com
docs.opennms.com
github.com

Details

Severity HIGH
CVSS Score 8.1
CVSS Vector CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CWE CWE-352
Public Exploit ✅ No
Source NVD
Published 2023-03-22
Updated 2026-08-12
Modified 2026-06-17

Affected Packages

Software From version Fixed in
horizon — 31.0.6
meridian — —
org.opennms:opennms-webapp — 31.0.6

Similar Threats

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