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MantisBT 2.28.0 Tag Deletion XSS (GHSA-fh48-f69w-7vmp)

high Nessus Plugin ID 303448

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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 2.28.0. It is, therefore, affected by a vulnerability:

 - A cross-site scripting (XSS) vulnerability exists in the tag deletion confirmation page (tag_delete.php) due to improper escaping of the tag name when displaying the confirmation message. An attacker can inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript. (CVE-2026-33517)

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.

See Also

http://www.nessus.org/u?282fdd8e

Plugin Details

Severity: High

ID: 303448

File Name: mantis_2_28_1_xss.nasl

Version: 1.4

Type: Remote

Published: 3/24/2026

Updated: 3/27/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.8

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-33517

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: 8.6

Threat Score: 6.1

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/a:mantisbt:mantisbt

Required KB Items: installed_sw/MantisBT

Exploit Ease: No known exploits are available

Patch Publication Date: 3/23/2026

Vulnerability Publication Date: 3/23/2026

Reference Information

CVE: CVE-2026-33517

IAVB: 2026-B-0075