CVE-2023-33621Public exploitNetwork attack vector

Authentication bypass via exposed GET token

Published Jun 13, 2023 · Updated Jul 9, 2026

Authentication bypass in GL.iNET GL-AR750S-Ext firmware 3.215 allows remote attackers to replay exposed administrator tokens. The OpenVPN Server configuration export places the administrator token in a GET query parameter instead of the Authorization header, exposing it through browser history, request logs, proxies, and Referer headers. Exposure requires an administrator to export the configuration and attackers to obtain a still-valid token; replay grants that session's access without reported integrity or availability impact.

CVSS severity5.9
Medium
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in GL.iNET GL-AR750S-Ext firmware 3.215 allows remote attackers to replay exposed administrator tokens. The OpenVPN Server configuration export places the administrator token in a GET query parameter instead of the Authorization header, exposing it through browser history, request logs, proxies, and Referer headers. Exposure requires an administrator to export the configuration and attackers to obtain a still-valid token; replay grants that session's access without reported integrity or availability impact.

The record

CVE
CVE-2023-33621
Published
Jun 13, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-294, CAPEC-60, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3Justin ApplegateCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
5.9NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
CAPEC-60Reusing Session IDs (aka Session Replay)
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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