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CVE-2023-38313

20
FAUCET Score

CVE-2023-38313 is a Denial-of-Service vulnerability affecting OpenNDS Captive Portal versions prior to 10.1.2. A remote unauthenticated attacker can trigger a NULL pointer dereference by sending a specially crafted HTTP GET request with a missing client redirect parameter, causing the OpenNDS service to crash. This vulnerability has a CVSS score of 7.5 (High), indicating it is easily exploitable over the network with no user interaction required, leading to a complete loss of availability. There is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 10.1.2CPE matchmatch criteria
cpe:2.3:a:opennds:captive_portal:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.96%
Probability of exploitation in next 30 days
EPSS Percentile
57.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0096 is in the 32nd percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

github_advisoryvendor investigatingvia nvd_reference
View patch

References

github.com / openNDS/openNDS/releases/tag/v10.1.2
Release NotesVendor Advisory
github.com / openwrt/routing/commit/0b19771fb2dd81e7c428759610aed583171eed80
source.sierrawireless.com / resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2023-006-v4