OpenNMS Stored XSS via SNMP Agent Data
Priority LOW 33CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
EPSS 0.00849 58th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| The OpenNMS Group | OpenNMS | 18.0.1 – 18.0.1 | — | No fix listed | CNA |
- OpenNMS VendorThe OpenNMS Group Affected 18.0.1 – 18.0.1 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:opennms:opennms:*:*:*:*:*:*:*:* | before 18.0.2-1 | Vulnerable | The OpenNMS Group |
- cpe:2.3:a:opennms:opennms:*:*:*:*:*:*:*:* Versions before 18.0.2-1 Vulnerable ·The OpenNMS Group
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2016-6556
- 2026-10-03 Alias added: GHSA-gg9p-hvqm-vj23
References
More The OpenNMS Group Opennms vulnerabilities
- TI-2015-06530 OpenNMS has a default password of rtc for the rtc account, which makes it easier for… CVSS 2.0HIGH 10.0
- TI-2020-01603 Junos Space: OpenNMS is accessible via port 9443 CVSS 3.1CRITICAL 9.8
- TI-2016-05619 OpenNMS Stored XSS via SNMP Trap Alerts CVSS 3.1HIGH 7.1
- TI-2021-07942 Cross-site scripting in OpenNMS CVSS 3.1MEDIUM 5.4
- TI-2014-03229 Multiple cross-site scripting (XSS) vulnerabilities in OpenNMS before 1.12.7 allow remote… CVSS 2.0MEDIUM 4.3
- TI-2008-05789 Cross-site scripting (XSS) vulnerability in surveillanceView.htm in OpenNMS 1.5.94 allows… CVSS 2.0MEDIUM 4.3
Sources
- CVE-2016-6556 · CVE Program
- CVE-2016-6556 · NVD
- FIRST EPSS
- GHSA-gg9p-hvqm-vj23 · GitHub Advisory Database · CC BY 4.0
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