CVE-2023-38316: An issue was discovered in OpenNDS Captive Portal before version 10.1.2. When the custom unescape callback is enabled, attackers can execute arbitrary...

Description

An issue was discovered in OpenNDS Captive Portal before version 10.1.2. When the custom unescape callback is enabled, attackers can execute arbitrary OS commands by inserting them into the URL portion of HTTP GET requests. 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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.08%

60.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-116

Affected Software

Vendor	Product	Versions
Opennds	Captive Portal	< 10.1.2

References

Timeline

Published: Nov 17, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-38316?

An issue was discovered in OpenNDS Captive Portal before version 10.1.2. When the custom unescape callback is enabled, attackers can execute arbitrary OS commands by inserting them into the URL portion of HTTP GET requests. 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.

How severe is CVE-2023-38316?

CVE-2023-38316 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.08% probability of exploitation in the next 30 days.

How do I fix CVE-2023-38316?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.