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The commit diff from GHSA-79jr-8fhm-8wv3 shows the fix added WebSecurityUtils.sanitizeString() around alarm.getReductionKey() in alarm/detail.jsp. This indicates the unescaped output of reduction keys in this template was the XSS vector. The vulnerability matches classic stored XSS patterns where user-controlled data (reduction keys) is rendered without proper sanitization in web views.
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| org.opennms:opennms | maven | < 31.0.3 | 31.0.3 |