GHSA-hxw5-9cc5-cmw5 — librenms/librenms
Fix: librenms/librenms#17603GHSA-hxw5-9cc5-cmw5 is a Cross-site Scripting (XSS) vulnerability in librenms/librenms. EPSS puts its 30-day exploitation probability at 11.9% (96th percentile). A fix is available for librenms/librenms — see the affected versions and patch details below.
LibreNMS stored Cross-site Scripting vulnerability in poller group name
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for GHSA-hxw5-9cc5-cmw5.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Real-World Exposure
librenms/librenmsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
LibreNMS v25.4.0 suffers from Stored Cross-Site Scripting (XSS) Vulnerability in the 'group name' parameter of the 'http://localhost/poller/groups' form. This vulnerability allows attackers to inject malicious scripts into web pages viewed by other users.
---------------------------------POC-----------------------------
Before Setting: Enable 'distributed_poller' in http://localhost/settings/poller/distributed
- Attacker creates a new poller group and injects the payload in the 'group name' parameter
payload: <script>alert('XSS')</script>
- Victim navigates to the 'http://localhost/addhost' to add a new host
- The payload is executed
code sink: https://github.com/librenms/librenms/blob/25.4.0/includes/html/pages/addhost.inc.php#L284
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | librenms/librenms | all versions | 25.5.0composer require librenms/librenms:^25.5.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for librenms/librenms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update librenms/librenms to 25.5.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-hxw5-9cc5-cmw5 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-hxw5-9cc5-cmw5 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-hxw5-9cc5-cmw5. 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-hxw5-9cc5-cmw5 in your dependencies?
O3 Security finds GHSA-hxw5-9cc5-cmw5 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.