← Vulnerability feed

Vulnerability record · CVE-2023-33621 · published 13 June 2023

CVE-2023-33621: Gl-inet gl-ar750s firmware authentication bypass by capture-replay vulnerability

Gl Inet · Gl Ar750s Firmware

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.

5.9 CVSS 3.1 Medium EPSS 0.71% · top 47.6% CWE-294 · Authentication bypass by capture-replay
5.9CVSS 3.1 base score
0.71%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
9 Jul 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://justinapplegate.me/2023/glinet-CVE-2023-33621/ ExploitThird Party Advisory
https://justinapplegate.me/2023/glinet-CVE-2023-33621/ ExploitThird Party Advisory

Track CVE-2023-33621 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-50919GL.iNet router NGINX authentication bypass via Lua pattern matchingGL.iNet devices before firmware 4.5.0 contain an authentication bypass in the NGINX web interface caused by improper Lua string pattern matching. A r…EPSS 48%analysed9.8CVE-2023-50921Gl-inet gl-mt1300 firmware improper privilege management vulnerabilityAn issue was discovered on GL.iNet devices through 4.5.0. Attackers can invoke the add_user interface in the system module to gain root privileges. T…EPSS 0.52%9.8CVE-2023-31475Gl-inet gl-s20 firmware classic buffer overflow vulnerabilityAn issue was discovered on GL.iNet devices before 3.216. The function guci2_get() found in libglutil.so has a buffer overflow when an item is request…EPSS 14%9.8CVE-2023-31471Gl-inet gl-s20 firmware vulnerabilityAn issue was discovered on GL.iNet devices before 3.216. Through the software installation feature, it is possible to install arbitrary software, suc…EPSS 1.1%7.8CVE-2023-50445Gl-inet gl-mt1300 firmware os command injection vulnerabilityShell Injection vulnerability GL.iNet A1300 v4.4.6, AX1800 v4.4.6, AXT1800 v4.4.6, MT3000 v4.4.6, MT2500 v4.4.6, MT6000 v4.5.0, MT1300 v4.3.7, MT300N…EPSS 9.1%7.5CVE-2023-31477Gl-inet gl-s20 firmware path traversal vulnerabilityA path traversal issue was discovered on GL.iNet devices before 3.216. Through the file sharing feature, it is possible to share an arbitrary directo…EPSS 0.94%7.5CVE-2023-31478Gl-inet gl-s20 firmware vulnerabilityAn issue was discovered on GL.iNet devices before 3.216. An API endpoint reveals information about the Wi-Fi configuration, including the SSID and ke…EPSS 30%7.5CVE-2023-31474Gl-inet gl-s20 firmware vulnerabilityAn issue was discovered on GL.iNet devices before 3.216. Through the software installation feature, it is possible to inject arbitrary parameters in …EPSS 0.82%

Source: NIST National Vulnerability Database (record CVE-2023-33621), CISA KEV, FIRST EPSS (scores of 2026-10-12). This page is refreshed as NVD updates the record.