Summary
LibreNMS: Stored XSS via graph_descr admin config settings echoed without escaping to all authenticated users
The graph_descr.<graphtype> family of settings is echoed verbatim without htmlspecialchars() in includes/html/pages/graphs.inc.php:194. Any admin can store a malicious HTML payload that executes in every authenticated user's browser viewing that graph type.
CVSS
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N, 4.8 Medium
Details
// graphs.inc.php:194
echo LibrenmsConfig::get('graph_descr.' . $vars['type']);
PoC
PUT /settings/graph_descr.device_processor
{"value": "<img src=x onerror=\"alert('ADV-15')\">"}
GET /graphs?type=device_processor
→ <img src=x onerror="alert('ADV-15')">
Prerequisite
Admin session to set the config value.
Impact
Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.
GHSA-7CJ5-V4PP-V632 has a CVSS score of 4.8 (Medium). The vector is network-reachable, high privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (26.7.0); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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echo htmlspecialchars(LibrenmsConfig::get('graph_descr.' . $vars['type']), ENT_QUOTES, 'UTF-8');
Frequently Asked Questions
- What is GHSA-7CJ5-V4PP-V632? GHSA-7CJ5-V4PP-V632 is a medium-severity cross-site scripting (XSS) vulnerability in librenms/librenms (composer), affecting versions < 26.7.0. It is fixed in 26.7.0. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
- How severe is GHSA-7CJ5-V4PP-V632? GHSA-7CJ5-V4PP-V632 has a CVSS score of 4.8 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of librenms/librenms are affected by GHSA-7CJ5-V4PP-V632? librenms/librenms (composer) versions < 26.7.0 is affected.
- Is there a fix for GHSA-7CJ5-V4PP-V632? Yes. GHSA-7CJ5-V4PP-V632 is fixed in 26.7.0. Upgrade to this version or later.
- Is GHSA-7CJ5-V4PP-V632 exploitable, and should I be worried? Whether GHSA-7CJ5-V4PP-V632 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-7CJ5-V4PP-V632 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-7CJ5-V4PP-V632? Upgrade
librenms/librenmsto 26.7.0 or later.