// For flags

CVE-2023-0871

An XML External Entity injection vulnerability

Severity Score

6.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

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.

*Credits: Moshe Apelbaum, Erik Wynter
CVSS Scores
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
Low
Attack Vector
Adjacent
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-02-16 CVE Reserved
  • 2023-08-11 CVE Published
  • 2024-10-01 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-611: Improper Restriction of XML External Entity Reference
CAPEC
  • CAPEC-201: Serialized Data External Linking
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Opennms
Search vendor "Opennms"
 Horizon
Search vendor "Opennms" for product "Horizon"
 >= 32.0.0 < 32.0.2
Search vendor "Opennms" for product "Horizon" and version " >= 32.0.0 < 32.0.2"
-
Affected
Opennms
Search vendor "Opennms"
 Horizon
Search vendor "Opennms" for product "Horizon"
 31.0.8
Search vendor "Opennms" for product "Horizon" and version "31.0.8"
-
Affected
Opennms
Search vendor "Opennms"
 Meridian
Search vendor "Opennms" for product "Meridian"
 >= 2020.0.0 < 2020.1.38
Search vendor "Opennms" for product "Meridian" and version " >= 2020.0.0 < 2020.1.38"
-
Affected
Opennms
Search vendor "Opennms"
 Meridian
Search vendor "Opennms" for product "Meridian"
 >= 2021.0.0 < 2021.1.30
Search vendor "Opennms" for product "Meridian" and version " >= 2021.0.0 < 2021.1.30"
-
Affected
Opennms
Search vendor "Opennms"
 Meridian
Search vendor "Opennms" for product "Meridian"
 >= 2022.1.0 < 2022.1.9
Search vendor "Opennms" for product "Meridian" and version " >= 2022.1.0 < 2022.1.9"
-
Affected
Opennms
Search vendor "Opennms"
 Meridian
Search vendor "Opennms" for product "Meridian"
 >= 2023.0.0 < 2023.1.6
Search vendor "Opennms" for product "Meridian" and version " >= 2023.0.0 < 2023.1.6"
-
Affected