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CVE-2023-0846

Unauthenticated, stored XSS in display of alarm reduction-key

MEDIUM
6.1
CVSS Score
Published: February 22, 2023 at 06:35 PM UTC
Updated: June 17, 2026 at 05:26 AM UTC
2 products affected across 1 vendorMeridianHorizon

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.5%

Description

Unauthenticated, stored cross-site scripting in the display of alarm reduction keys in multiple versions of OpenNMS Horizon and Meridian could allow an attacker access to confidential session information. 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Horizon· Opennms
95%
v < 31.0.426.1.0 ≤ v < 31.0.426.1.0
Affected range stops below 31.0.4, so it looks safe — our inference, not a vendor statement
Meridian· Opennms
95%
v < 2023.1.02020.1.0 ≤ v < 2020.1.322021.1.0 ≤ v < 2021.1.242022.1.0 ≤ v < 2022.1.132020.1.02021.1.02022.1.0
Affected range stops below 2020.1.32, so it looks safe — our inference, not a vendor statement
Affected range stops below 2021.1.24, so it looks safe — our inference, not a vendor statement
Affected range stops below 2022.1.13, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 2023.1.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Release Notes
Source: [email protected]
https://docs.opennms.com/meridian/2022/releasenotes/changelog.html#releasenotes-changelog-Meridian-2022.1.13
Patch
Source: [email protected]
https://github.com/OpenNMS/opennms/pull/5506/files

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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