What is CVE-2023-33621?

CVE-2023-33621 is a medium-severity vulnerability in Gl-Inet Gl-Ar750s, classified under Authentication Bypass by Capture-replay. CVSS score: 5.9/10. Published 2023-06-13.

How severe is CVE-2023-33621?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Gl-Inet Gl-Ar750s

CVE-2023-33621

GL.iNET GL-AR750S-Ext firmware v3.215 inserts the admin authentication token into a GET request when the OpenVPN Server config file is downloaded. The token is then left in the browser history or access logs, potentially allowing attackers to bypass authentication via session replay.

Published 2023-06-13 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Gl-Inet Gl-Ar750s
Gl-Inet Gl-Ar750s Firmware — versions 3.215

Weakness classification (CWE)

CWE-294 — Authentication Bypass by Capture-replay

References

af854a3a-2127-422b-91ae-364da2661108 (Broken Link)
af854a3a-2127-422b-91ae-364da2661108 (Broken Link)
justinapplegate.me/2023/glinet-CVE-2023-33621/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-33621?: CVE-2023-33621 is a medium-severity vulnerability in Gl-Inet Gl-Ar750s, classified under Authentication Bypass by Capture-replay. CVSS score: 5.9/10. Published 2023-06-13.
How severe is CVE-2023-33621?: Medium severity. CVSS v3 base score is 5.9 out of 10.