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CVE-2023-40612

21
FAUCET Score

CVE-2023-40612 is an XML External Entity (XXE) injection vulnerability affecting OpenNMS Horizon versions prior to 32.0.2 and OpenNMS Meridian. An authenticated attacker with ROLE_FILESYSTEM_EDITOR privileges on an internal network can exploit this to achieve high confidentiality, integrity, and availability impacts. With a CVSS score of 8.0 (High), this vulnerability has no known public exploits, Metasploit modules, or Nuclei templates, and shows no active exploitation or significant community discussion. Organizations are advised to upgrade to Horizon 32.0.2+ or Meridian 2023.1.5+ to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
>= 31.0.8, < 32.0.2CPE matchmatch criteria
cpe:2.3:a:opennms:horizon:*:*:*:*:*:*:*:*
>= 2023.0.0, < 2023.1.5CPE matchmatch criteria
cpe:2.3:a:opennms:meridian:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
0.5
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 21st percentile among its peer group of 552 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

docs.opennms.com / meridian/2023/releasenotes/changelog.html
Release Notes
github.com / OpenNMS/opennms/pull/6288
Patch