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: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Wed, 04 Nov 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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: 2026-11-04T14:58:11.190Z

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

Link: CVE-2026-107147

cve-icon Vulnrichment

Updated: 2026-11-04T14:51:18.544Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-27T10:16:54.290

Modified: 2026-11-04T15:17:25.830

Link: CVE-2026-107147

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T22:17:30Z

Weaknesses