What’s Vulnerable › Vulnerabilities

CVE-2020-35700

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-08 · updated 2026-06-17
• Weakness: CWE-89

Description

A second-order SQL injection issue in Widgets/TopDevicesController.php (aka the Top Devices dashboard widget) of LibreNMS before 21.1.0 allows remote authenticated attackers to execute arbitrary SQL commands via the sort_order parameter against the /ajax/form/widget-settings endpoint.

Affected products

• librenms: before 21.1.0 — fixed in 21.1.0

How to fix

Upgrade to a fixed version: librenms 21.1.0. Check the vendor advisory for mitigations.

References

• https://github.com/librenms/librenms/blob/master/app/Http/Controllers/Widgets/TopDevicesController.php
• https://github.com/librenms/librenms/issues/12405
• https://github.com/librenms/librenms/pull/12422
• https://github.com/librenms/librenms/releases/tag/21.1.0
• https://www.horizon3.ai/disclosures/librenms-second-order-sqli
• https://github.com/librenms/librenms/blob/master/app/Http/Controllers/Widgets/TopDevicesController.php
• https://github.com/librenms/librenms/issues/12405
• https://github.com/librenms/librenms/pull/12422
• https://github.com/librenms/librenms/releases/tag/21.1.0
• https://www.horizon3.ai/disclosures/librenms-second-order-sqli

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