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MEDIUM severity

CVE-2023-48294 — librenms

MEDIUMFix: librenms/librenms@489978a

CVE-2023-48294 is a medium-severity (CVSS 4.3) Information Exposure vulnerability in librenms/librenms. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for librenms/librenms — see the affected versions and patch details below.

Broken Access control on Graphs Feature in LibreNMS

Also known asGHSA-fpq5-4vwm-78x4
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs53th percentile — riskier than 53% of all scored CVEsHighest risk
0.00%0.40%0.80%1.19%0.0%0.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘librenms/librenms

Real-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

This vulnerability occurs when application is not checking access of each type of users as per their role and it autorizing the users to access any feature. When user access his Device dashboard in librenms, one request is going to graph.php to access image of graphs generated on the particular Device. This request can be accessed by lower privileged users as well and they can enumerate devices on librenms with their id or hostname.

Details

Give all details on the vulnerability. Pointing to the incriminated source code is very helpful for the maintainer.

PoC

  1. Login with Lower privilege user

  2. Go to /graph.php?width=150&height=45&device=1&type=device_ping_perf&from=1699022192&legend=no&bg=FFFFFF00&popup_title=ICMP+Response

  3. If its showing image with "device*ping_perf" which confirms that there is device with id 1

  4. Now you can change device parameter in above URL with hostname to check if that Hostname/IP exist or not like http://127.0.0.1:8000/graph.php?width=150&height=45&device=127.0.0.1&type=device_ping_perf&from=1699022192&legend=no&bg=FFFFFF00&popup_title=ICMP+Response

  5. If device hostname doesn't exist then it should show 500 error

Check attached screenshots for more info

Vulnerable code: https://github.com/librenms/librenms/blob/fa93034edd40c130c2ff00667ca2498d84be6e69/html/graph.php#L19C1-L25C2

Above is vulnerable line of code from Line number 19-25 This is not checking privilege of users to access any device hostname, its just checking if user is authenticated or not

Impact

Low privilege users can see all devices registered by admin users by using this method

Solution

Implement privilege access control feature to check if low privilege user have access or not.

Screenshots:-

<img width="967" alt="Screenshot 2023-11-04 at 8 31 15 PM" src="https://user-images.githubusercontent.com/31764504/281085588-1c5d81b9-83d7-4ba8-baf3-03c95a99cefe.png"> <img width="973" alt="Screenshot 2023-11-04 at 8 31 36 PM" src="https://user-images.githubusercontent.com/31764504/281085614-7a4d13b0-d316-4d24-bdd2-05c3a80ffd59.png"> <img width="955" alt="Screenshot 2023-11-04 at 8 31 48 PM" src="https://user-images.githubusercontent.com/31764504/281085629-43aa2b6f-7b18-415f-8001-519bda45f918.png">

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistlibrenms/librenmsall versions23.11.0composer require librenms/librenms:^23.11.0

Affected Products

1 product · 1 configurations
Application
librenmslibrenms
< 23.11.0
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring …

github.comNVDNov 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

    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.

  2. Fix

    Update librenms/librenms to 23.11.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-48294 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

### Summary This vulnerability occurs when application is not checking access of each type of users as per their role and it autorizing the users to access any feature. When user access his Device dashboard in librenms, one request is going to graph.php to access image of graphs generated on the particular Device. This request can be accessed by lower privileged users as well and they can enumerate devices on librenms with their id or hostname. ### Details _Give all details on the vulnerability. Pointing to the incriminated source code is very helpful for the maintainer._ ### PoC 1. Login wi
O3 Security · Impact-Aware SCA

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CVE-2023-48294: librenms — Fixed in 23.11.0