SB2026080412 - Multiple vulnerabilities in LibreNMS

Description

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting (CVE-ID: N/A)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

The vulnerability allows a remote user to execute arbitrary script in a victim's browser.

The vulnerability exists due to cross-site scripting in includes/html/pages/graphs.inc.php when rendering graph description settings. A remote privileged user can store a malicious HTML payload in the graph_descr. admin configuration setting to execute arbitrary script in a victim's browser.

User interaction is required to view a graph of the affected type.

2) Cross-site scripting (CVE-ID: N/A)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

The vulnerability allows a remote user to execute arbitrary script in the victim's browser.

The vulnerability exists due to cross-site scripting in the device showconfig page when rendering Oxidized API response fields into HTML. A remote privileged user can configure the Oxidized integration URL to an attacker-controlled server and cause crafted response fields to be stored and rendered to execute arbitrary script in the victim's browser.

User interaction is required to view a device showconfig tab, and the Oxidized integration must be enabled.

Remediation

Install update from vendor's website.

References

• https://github.com/librenms/librenms/security/advisories/GHSA-7cj5-v4pp-v632
• https://github.com/librenms/librenms/security/advisories/GHSA-7gww-x7fh-jf9j