PatchTheCVECVE-2023-38316: An issue was discovered in OpenNDS Captive Portal before version 10.1.2
CVE-2023-38316 is a critical-severity flaw (CVSS 9.8) affecting captive portal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.1% (top 35%) |
| CISA exploited list | No |
| Weakness | CWE-116 |
| Published | 2023-11-17 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2023-38316?
captive portal: upgrade to 10.1.2. Exact commands for each OS are on this page.
Is CVE-2023-38316 being exploited?
CVE-2023-38316 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2023-38316 affect?
CVE-2023-38316 affects captive portal. Severity is critical (CVSS 9.8). 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
How urgent is CVE-2023-38316?
Priority 56/100. Critical severity; Remotely exploitable, no login, no user action
Software pages
Related CVEs
- CVE-2023-38324 MEDIUM 5.3 UPGRADE An issue was discovered in OpenNDS before 10.1.2
- CVE-2023-38322 HIGH 7.5 UPGRADE An issue was discovered in OpenNDS Captive Portal before version 10.1.2
- CVE-2023-38320 HIGH 7.5 UPGRADE An issue was discovered in OpenNDS Captive Portal before version 10.1.2
- CVE-2023-38315 HIGH 7.5 UPGRADE An issue was discovered in OpenNDS Captive Portal before version 10.1.2
- CVE-2023-38314 MEDIUM 6.5 UPGRADE An issue was discovered in OpenNDS Captive Portal before version 10.1.2