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CVE-2023-0846

21
FAUCET Score

CVE-2023-0846 is an unauthenticated, stored cross-site scripting (XSS) vulnerability affecting OpenNMS Horizon and Meridian, specifically in the display of alarm reduction keys. This flaw could allow an attacker to gain access to confidential session information. With a CVSS score of 6.1 (MEDIUM), it requires user interaction (UI:R) and has low impact on confidentiality and integrity (C:L, I:L), but can be exploited over the network (AV:N). There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 31.0.4CPE matchmatch criteria
cpe:2.3:a:opennms:horizon:*:*:*:*:*:*:*:*
< 2023.1.0CPE matchmatch criteria
cpe:2.3:a:opennms:meridian:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.7MEDIUM

CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.5
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.49%
Probability of exploitation in next 30 days
EPSS Percentile
39.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0049 is in the 42nd percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: org.opennms:opennmsFixed in: 31.0.3

Vendor Advisories (1)

mavenGHSA-79jr-8fhm-8wv3medium

OpenNMS Horizon and Meridian vulnerable to Cross-site Scripting

Feb 22, 2023

References

docs.opennms.com / meridian/2022/releasenotes/changelog.html
Release Notes
github.com / OpenNMS/opennms/pull/5506/files
Patch