CVE-2026-40598 MEDIUM

CVE-2026-40598: MantisBT has Potential Referer-Based Reflected HTML Injection / XSS in Tag Update Page

Vendor Mantisbt
Product mantisbt
Weakness CWE-79 · XSS
Published May 22, 2026
Last update May 23, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.28.1 and below, improper escaping of the redirection page (retrieved from the request's Referer header) allows an attacker to inject HTML. While this is generally not directly actionable as modern browsers will URL-encode special characters, on some specific server configurations this could poison the cache, leading to cross-site scripting. This issue has been fixed in version 2.28.2.

Key dates

02Disclosure timeline

May 22, 2026 CVE published
May 23, 2026 Record updated

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04Related CVE

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