CVE-2023-0868

Stealing Cookies using Reflected XSS via graph results

6.7 MediumFix available

Reflected cross-site scripting in graph results in multiple versions of OpenNMS Meridian and Horizon could allow an attacker access to steal session cookies. Users should upgrade to Meridian 2023.1.0 or newer, or Horizon 31.0.4. 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.

Attack profile

How easy it is to exploit

Attack vector: Adjacent network
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

0.44%Down 0.4 points since Feb 24, 2023

What each source reports

CVE List Score used 6.7

Stealing Cookies using Reflected XSS via graph results

Record: CVE-2023-0868
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Weakness: CWE-20, CWE-79
Updated: 2026-11-02

EUVDEUVD-2023-0704 6.7

Record: EUVD-2023-0704
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-g57g-rvpg-2f2c 6.1

OpenNMS Meridian and Horizon vulnerable to Cross-site Scripting

Reflected cross-site scripting in graph results in multiple versions of OpenNMS Meridian and Horizon could allow an attacker access to steal session cookies.

Record: GHSA-g57g-rvpg-2f2c
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

NVD 6.7

Record: CVE-2023-0868
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-20, CWE-79
Updated: 2026-11-02

OSV 6.7

Stealing Cookies using Reflected XSS via graph results

Record: CVE-2023-0868
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Weakness: CWE-20, CWE-79
Updated: 2026-11-02

OSVGHSA-g57g-rvpg-2f2c 6.1

OpenNMS Meridian and Horizon vulnerable to Cross-site Scripting

Reflected cross-site scripting in graph results in multiple versions of OpenNMS Meridian and Horizon could allow an attacker access to steal session cookies.

Record: GHSA-g57g-rvpg-2f2c
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`org.opennms:opennms-webapp` Maven	before 31.0.4	31.0.4

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, products, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-0868 is a medium vulnerability (CVSS 6.7) in Opennms Horizon, published February 23, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.44%, the 38th percentile. Fixed in org.opennms:opennms-webapp 31.0.4.