HIGH

CVE-2026-100718

Froxlor before 2.3.12 Authentication Bypass via EmailSender.add

CVSS v3

7.1

HIGH

EPSS Score

—

exploit probability

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

Froxlor through 2.3.10 does not enforce the mail.allow_external_domains policy in the EmailSender.add API command. When an administrator has enabled the allowed-sender feature but disabled external allowed-sender domains (mail.enable_allow_sender = 1, mail.allow_external_domains = 0), an authenticated customer with API access can still use EmailSender.add to register an arbitrary external sender address for their mailbox, which is stored despite the policy. This creates a bypass between the UI/a

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Published: 2026-09-26
Last Modified: 2026-09-26

Frequently asked questions

What is CVE-2026-100718?

Is CVE-2026-100718 actively exploited?

Active exploitation of CVE-2026-100718 has not been confirmed.

What is the CVSS score for CVE-2026-100718?

CVE-2026-100718 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N.

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