GHSA-mjv2-6jv4-vrg7 is a medium-severity (CVSS 6.1) Improper Input Validation vulnerability in org.opennms:opennms. O3 Security confirms whether GHSA-mjv2-6jv4-vrg7 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
OpenNMS Meridian and Horizon vulnerable to Cross-site Scripting
Real-World Exposure
org.opennms:opennmsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
Multiple stored and reflected cross-site scripting vulnerabilities in webapp jsp pages in multiple versions of OpenNMS Meridian and Horizon could allow an attacker access to confidential session information.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.opennms:opennms | all versions | 31.0.4 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.opennms:opennms. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update org.opennms:opennms to 31.0.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mjv2-6jv4-vrg7 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-mjv2-6jv4-vrg7 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-mjv2-6jv4-vrg7. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-mjv2-6jv4-vrg7 in your dependencies?
O3 detects GHSA-mjv2-6jv4-vrg7 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.