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CVE-2016-6556

21
FAUCET Score

CVE-2016-6556 describes a stored Cross-Site Scripting (XSS) vulnerability in OpenNMS versions 18.0.1 and earlier, where malicious SNMP 'sysName' or 'sysContact' data can inject an XSS payload into the web UI. This medium-severity vulnerability (CVSS 6.1) has a network attack vector and low attack complexity, potentially leading to limited impact on confidentiality and integrity if a user views the compromised data. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 18.0.2-1CPE matchmatch criteria
cpe:2.3:a:opennms:opennms:*:*:*:*:*:*:*:*
>= 18.0.1, <= 18.0.1CPE match
cpe:2.3:a:opennms:opennms:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.80%
Probability of exploitation in next 30 days
EPSS Percentile
52.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0080 is in the 61st percentile among its peer group of 26,220 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / OpenNMS/opennms/pull/1019
PatchThird Party Advisory
rapid7.com / blog/post/2016/11/15/r7-2016-24-opennms-stored-xss-via-snmp-cve-2016-6555-cve-2016-6556
ExploitThird Party Advisory