CVE-2023-38316

Opennds Captive Portal vulnerability

9.8 CRITICALEPSS 1.08%

Published17 Nov 2023

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Opennds Captive Portal< 10.1.2

Remediation

Fixed in

Opennds Captive Portal≥ 10.1.2

Frequently asked

Is CVE-2023-38316 being actively exploited?

CVE-2023-38316 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.08%.

How severe is CVE-2023-38316?

CVE-2023-38316 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.08% probability of exploitation.

Which products are affected by CVE-2023-38316?

Affected products include Opennds Captive Portal.

How do I fix CVE-2023-38316?

Upgrade affected software to a fixed version, for example Opennds Captive Portal 10.1.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-38316 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.