Detections
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MantisBT 2.11.0 < 2.28.2 Font Family Preference XSS (GHSA-j3v9-553h-x28j)

high Nessus Plugin ID 315204

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Synopsis

The remote host is affected by a cross-site scripting vulnerability.

Description

The version of MantisBT installed on the remote host is 2.11.0 or later but prior to 2.28.2. It is, therefore, affected by a vulnerability:

 - MantisBT is Vulnerable to XSS leading to account takeover via updating a user's font family preference.
 (CVE-2026-40596)

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 2.28.2 or later.

See Also

http://www.nessus.org/u?2b9d2daa

Plugin Details

Severity: High

ID: 315204

File Name: mantis_CVE-2026-40596.nasl

Version: 1.3

Type: Remote

Published: 5/18/2026

Updated: 5/28/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.8

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2026-40596

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.2

Threat Score: 4.2

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:H/SA:L

Vulnerability Information

CPE: cpe:/a:mantisbt:mantisbt

Required KB Items: installed_sw/MantisBT

Exploit Ease: No known exploits are available

Patch Publication Date: 5/9/2026

Vulnerability Publication Date: 5/9/2026

Reference Information

CVE: CVE-2026-40596

IAVB: 2026-B-0122