GHSA-rq42-58qf-v3qx is a medium-severity (CVSS 5.3) CWE-307 vulnerability in librenms/librenms. 1 public exploit reference exists, so weaponization risk is real. A fix is available for librenms/librenms — see the affected versions and patch details below.
LibreNMS vulnerable to rate limiting bypass on login page
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.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA’s SSVC triage for GHSA-rq42-58qf-v3qx.
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.
How urgent is this, really
GHSA-rq42-58qf-v3qx plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 378,567 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
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
Summary
Application is using two login methods and one of them is using GET request for authentication. There is no rate limiting security feature at GET request or backend is not validating that.
PoC
Go to /?username=admin&password=password&submit= Capture request in Burpsuite intruder and add payload marker at password parameter value. Start the attack after adding your password list We have added 74 passwords Check screenshot for more info <img width="1241" alt="Screenshot 2023-11-06 at 8 55 19 PM" src="https://user-images.githubusercontent.com/31764504/280905148-42274f1e-f869-4145-95b4-71c0bffde3a0.png">
Impact
An attacker can Bruteforce user accounts and using GET request for authentication is not recommended because certain web servers logs all requests in old logs which can also store victim user credentials.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | librenms/librenms | all versions | 23.11.0composer require librenms/librenms:^23.11.0 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
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 23.11.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-rq42-58qf-v3qx 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-rq42-58qf-v3qx can be triaged on real exposure rather than presence alone.
Tailored to GHSA-rq42-58qf-v3qx. 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-rq42-58qf-v3qx in your dependencies?
O3 Security finds GHSA-rq42-58qf-v3qx across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.