CVE-2026-61875: Openwrt Luci

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

luci-app-upnp contains a stored cross-site scripting vulnerability that allows unauthenticated LAN clients to inject JavaScript via UPnP IGD AddPortMapping SOAP requests. Attackers can send malicious HTML in the NewPortMappingDescription field, which miniupnpd stores and luci-app-upnp renders without output encoding, executing the payload when administrators view the UPnP or Status pages.

Affected products

• Openwrt Luci: before 24.10.8 (fixed in 24.10.8); from 25.12.0, before 25.12.5 (fixed in 25.12.5)

Published 2026-07-12. Last modified 2026-09-30.