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FreeBSD : mailpit -- WebSocket origin check bypass via percent-encoded path (52a3f202-8a77-11f1-ac5d-0897988a1c07)

high Nessus Plugin ID 330520

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 52a3f202-8a77-11f1-ac5d-0897988a1c07 advisory.

 Mailpit author reports:
 The cross-site WebSocket hijacking fix was reimplemented as an origin check gated on a raw-URI prefix test, but Go's ServeMux routes on the percent-decoded path, so requesting /%61pi/events reaches the WebSocket handler while skipping the only origin control, and the upgrader itself accepts every origin.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?033229ef

http://www.nessus.org/u?6a3a7250

Plugin Details

Severity: High

ID: 330520

File Name: freebsd_pkg_52a3f2028a7711f1ac5d0897988a1c07.nasl

Version: 1.1

Type: Local

Published: 7/29/2026

Updated: 7/29/2026

Supported Sensors: Nessus

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:mailpit

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 7/28/2026

Vulnerability Publication Date: 7/28/2026