CVE-2023-0871

mediumpriority · track · 24EPSS 0.005 · 46 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.55% (46th) EPSS

CVSS 6.1 · medium

Is it mine?

12 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-28

XXE injection in /rtc/post/ endpoint in OpenMNS Horizon 31.0.8 and versions earlier than 32.0.2 on multiple platforms is 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.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.4–8.8

v3.16.1mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 2.7

v3.15.4mediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:Lsecondary · ENISA EU

v3.15.4mediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:Lsecondary · security@opennms.comexploitability 2.3 · impact 2.7

v3.18.8highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:Lsecondary · OSV

v3.15.6mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-611USprimaryCWE-611US

affected products (12)

Products and version ranges known to be affected.

The OpenNMS Group Horizon31.0.8 → 32.0.2enisa_euvdEU
The OpenNMS Group Meridian2020.0.0 → 2020.1.38enisa_euvdEU
The OpenNMS Group Meridian2021.0.0 → 2021.1.30enisa_euvdEU
The OpenNMS Group Meridian2022.0.0 → 2022.1.19enisa_euvdEU
The OpenNMS Group Meridian2023.0.0 → 2023.1.6enisa_euvdEU
opennms horizon= 31.0.8nvdUScpe:2.3:a:opennms:horizon:*:*:*:*:*:*:*:*
opennms horizon32.0.0 → 32.0.2nvdUScpe:2.3:a:opennms:horizon:*:*:*:*:*:*:*:*
opennms meridian2020.0.0 → 2020.1.38nvdUScpe:2.3:a:opennms:meridian:*:*:*:*:*:*:*:*
opennms meridian2021.0.0 → 2021.1.30nvdUScpe:2.3:a:opennms:meridian:*:*:*:*:*:*:*:*
opennms meridian2022.1.0 → 2022.1.9nvdUScpe:2.3:a:opennms:meridian:*:*:*:*:*:*:*:*
opennms meridian2023.0.0 → 2023.1.6nvdUScpe:2.3:a:opennms:meridian:*:*:*:*:*:*:*:*
Maven org.opennms.core:org.opennms.core.xml31.0.8 → 32.0.2osvUSpkg:maven/org.opennms.core/org.opennms.core.xml

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-2qc8-r663-v864OpenNMS Horizon XXE Injection Vulnerability2023-08-11ghsa · osvUS
XXE injection in `/rtc/post/ endpoint` in OpenNMS Horizon 31.0.8 and versions earlier than 32.0.2 on multiple platforms is 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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2023-08-11modified 2026-06-17

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+1517 more

references (7)

External citations — patches, advisories, analysis.

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