CVE-2023-38315: Opennds Captive Portal

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a try_to_authenticate NULL pointer dereference that can be triggered with a crafted GET HTTP with a missing client token query string parameter. Triggering this issue results in crashing OpenNDS (a Denial-of-Service condition). Affected OpenNDS Captive Portal before version 10.1.2 fixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on 28. August 2023 by updating OpenNDS to version 10.1.3.

Affected products

• Opennds Captive Portal: before 10.1.2 (fixed in 10.1.2)

Published 2023-11-17. Last modified 2026-06-17.