CVE-2023-0871 is an XML External Entity (XXE) injection vulnerability affecting OpenNMS Horizon versions 31.0.8 and earlier, as well as various OpenNMS Meridian versions. This flaw, located in the /rtc/post/ endpoint, allows attackers to force the affected system to make arbitrary HTTP requests to internal and external services. Rated as MEDIUM severity with a CVSS score of 6.1, the vulnerability can be exploited over the adjacent network with low attack complexity and no user interaction required. Successful exploitation could lead to limited confidentiality and integrity impacts. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. While there is minimal community discussion, OpenNMS recommends upgrading to Meridian 2023.1.6, 2022.1.19, 2021.1.30, 2020.1.38 or Horizon 32.0.2 or newer.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 32.0.0, < 32.0.2CPE matchmatch criteria | cpe:2.3:a:opennms:horizon:*:*:*:*:*:*:*:* | ||
31.0.8CPE matchmatch criteria | cpe:2.3:a:opennms:horizon:31.0.8:*:*:*:*:*:*:* | ||
>= 2020.0.0, < 2020.1.38CPE matchmatch criteria | cpe:2.3:a:opennms:meridian:*:*:*:*:*:*:*:* | ||
>= 2021.0.0, < 2021.1.30CPE matchmatch criteria | cpe:2.3:a:opennms:meridian:*:*:*:*:*:*:*:* | ||
>= 2022.1.0, < 2022.1.9CPE matchmatch criteria | cpe:2.3:a:opennms:meridian:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L
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