Skip to main content

Boteraser | Website and Server Security Solutions

🛡️ 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.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

  • Attack vector: Adjacent network — the attacker has to sit on the same local or logical network.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: Required — someone has to click, open or visit something.
  • Scope: Changed — a successful attack reaches components beyond the vulnerable one.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: 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

Other advisories for this package

horizon has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-352: Cross-Site Request Forgery (CSRF)) in other software:

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 2026-08-20
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

Site Security Check

Is horizon part of your stack?

CVE-2023-0870 is rated CVSS 8.1 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

Browse related advisories

All advisoriesCVECVE 2023
✓