CVE-2023-0871

XXE injection in /rtc/post/ endpoint in OpenMNS Horizon 31.0.8 and versions earlier than 32.0.2 on multiple platformsis vulnerable to XML external entity (XXE) injection, which can be used for instance to force Horizon to make arbitrary HTTP requests to internal and external services.The solution is to upgrade to Meridian 2023.1.6, 2022.1.19, 2021.1.30, 2020.1.38 or Horizon 32.0.2 or newer. 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.OpenNMS thanks Erik Wynter and Moshe Apelbaum for reporting this issue.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.4 MEDIUM
ADJACENT_NETWORK
LOW
LOW
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L
OpenNMSCNA
5.4 MEDIUM
ADJACENT_NETWORK
LOW
LOW
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L
CVEADP
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CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 9%
VendorProductVersion
opennmshorizon
32.0.0 ≤
𝑥
< 32.0.2
opennmshorizon
31.0.8
opennmsmeridian
2020.0.0 ≤
𝑥
< 2020.1.38
opennmsmeridian
2021.0.0 ≤
𝑥
< 2021.1.30
opennmsmeridian
2022.1.0 ≤
𝑥
< 2022.1.9
opennmsmeridian
2023.0.0 ≤
𝑥
< 2023.1.6
𝑥
= Vulnerable software versions