Description
The twofactor_gauthenticator plugin for Roundcube is vulnerable to 2fa authentication bypass by spoofed client address headers. Due to the lack of validation of the Client-IP and X-Forwarded-For headers, an attacker who obtains user's password can spoof a whitelisted IP address, resulting in the second factor being bypassed.




This issue was fixed in commit 4640889.
Published: 2026-10-27
Score: 6.3 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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History

Tue, 27 Oct 2026 09:45:00 +0000

Type Values Removed Values Added
Description The twofactor_gauthenticator plugin for Roundcube is vulnerable to 2fa authentication bypass by spoofed client address headers. Due to the lack of validation of the Client-IP and X-Forwarded-For headers, an attacker who obtains user's password can spoof a whitelisted IP address, resulting in the second factor being bypassed. This issue was fixed in commit 4640889.
Title Authentication bypass by spoofing in twofactor_gauthenticator
First Time appeared Alexandregz
Alexandregz twofactor Gauthenticator
Weaknesses CWE-290
CPEs cpe:2.3:a:alexandregz:twofactor_gauthenticator:*:*:*:*:*:*:*:*
Vendors & Products Alexandregz
Alexandregz twofactor Gauthenticator
References
Metrics cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

Alexandregz Twofactor Gauthenticator
cve-icon MITRE

Status: PUBLISHED

Assigner: CERT-PL

Published:

Updated: 2026-10-27T09:36:01.938Z

Reserved: 2026-10-07T08:44:03.177Z

Link: CVE-2026-107147

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-290

    Authentication Bypass by Spoofing