MantisBT < 2.28.1 SOAP API Authentication Bypass (GHSA-phrq-pc6r-f6gh)

critical Nessus Plugin ID 303449

Synopsis

The remote host is affected by an authentication bypass vulnerability.

Description

The version of MantisBT installed on the remote host is prior to 2.28.1. It is, therefore, affected by a vulnerability:

- An authentication bypass vulnerability exists in the SOAP API due to improper type checking on the password parameter when running on MySQL family databases. Using a crafted SOAP envelope, an attacker knowing the victim's username is able to login to the SOAP API without knowledge of the actual password and execute any API function they have access to. (CVE-2026-30849)

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

Solution

Upgrade to MantisBT version 2.28.1 or later.

Plugin Details

Severity: Critical

ID: 303449

File Name: mantis_2_28_1_auth_bypass.nasl

Version: 1.1

Type: remote

Family: CGI abuses

Published: 3/24/2026

Updated: 3/24/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-30849

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:/a:mantisbt:mantisbt

Required KB Items: installed_sw/MantisBT

Patch Publication Date: 3/23/2026

Vulnerability Publication Date: 3/23/2026

Reference Information

CVE: CVE-2026-30849

Detections

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