CVE-2016-6556: Opennms

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

OpenNMS version 18.0.1 and prior are vulnerable to a stored XSS issue due to insufficient filtering of SNMP agent supplied data. By creating a malicious SNMP 'sysName' or 'sysContact' response, an attacker can store an XSS payload which will trigger when a user of the web UI views the data. This issue was fixed in version 18.0.2, released on September 20, 2016.

Affected products

• Opennms Opennms: before 18.0.2-1 (fixed in 18.0.2-1)

Published 2021-09-24. Last modified 2026-06-17.