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CVE-2026-40596— MantisBT is vulnerable to XSS and potential account takeover via user font family preference update

AI Predicted 8.4 Difficulty: Easy

Affected Version Matrix 1

VendorProductVersion RangeStatus
mantisbtmantisbt>= 2.11.0, < 2.28.2affected
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I. Basic Information for CVE-2026-40596

Vulnerability Information

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Vulnerability Title
MantisBT is vulnerable to XSS and potential account takeover via user font family preference update
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.11.0 through 2.28.1 allow any authenticated user to inject arbitrary HTML by updating their account's font family. Upon exploitation, an XSS payload would be reflected on every MantisBT page. Leveraging another vulnerability (CSP bypass, see GHSA-9c3j-xm6v-j7j3), the attacker could achieve account takeover. This issue has been fixed in version 2.28.2.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
mantisbtmantisbt >= 2.11.0, < 2.28.2 -

II. Public POCs for CVE-2026-40596

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III. Intelligence Information for CVE-2026-40596

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Patch · 2Advisory · 3

Same Patch Batch · mantisbt · 2026-05-22 · 4 CVEs total

CVE-2026-40597MantisBT has a Content Security Policy bypass via attachments
CVE-2026-40598MantisBT has Potential Referer-Based Reflected HTML Injection / XSS in Tag Update Page
CVE-2026-40607MantisBT is Vulnerable to Stored XSS Through its Saved-Filter Owner Column

IV. Related Vulnerabilities

V. Comments for CVE-2026-40596

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