CVE-2021-33516: Gnome Gupnp

High severity, CVSS 8.1. EPSS: 1.1% chance of exploitation in the next 30 days.

An issue was discovered in GUPnP before 1.0.7 and 1.1.x and 1.2.x before 1.2.5. It allows DNS rebinding. A remote web server can exploit this vulnerability to trick a victim's browser into triggering actions against local UPnP services implemented using this library. Depending on the affected service, this could be used for data exfiltration, data tempering, etc.

Affected products

• Gnome Gupnp: before 1.0.7 (fixed in 1.0.7); from 1.1.0, before 1.2.5 (fixed in 1.2.5)

Published 2021-05-24. Last modified 2026-06-17.