TI-2026-29334 Aliases CVE-2026-40598 GHSA-6jh4-47v2-4g37

MantisBT has Potential Referer-Based Reflected HTML Injection / XSS in Tag Update Page

MEDIUM 64CWE-79Published 2026-05-22 · Updated 2026-05-23

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00447 39th percentileScored 2026-11-07

Fix Fixed mantisbt (mantisbt): 2.28.2mantisbt/mantisbt (Packagist): 2.28.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
mantisbt	mantisbt	before 2.28.2	2.28.2	Patch available	CNA
—	mantisbt/mantisbt (Packagist)	before 2.28.2	2.28.2	Patch available	GHSA-6jh4-47v2-4g37

mantisbt Vendormantisbt Affected before 2.28.2 Fixed in 2.28.2 Patch available CNA
mantisbt/mantisbt (Packagist) Vendor— Affected before 2.28.2 Fixed in 2.28.2 Patch available GHSA-6jh4-47v2-4g37

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:mantisbt:mantisbt::::::::	—	—	mantisbt

cpe:2.3:a:mantisbt:mantisbt:*:*:*:*:*:*:*:* Versions — — ·mantisbt

Remediation

Fix · CNA mantisbt (mantisbt) Fixed in 2.28.2
Fix · GHSA-6jh4-47v2-4g37 mantisbt/mantisbt (Packagist) Fixed in 2.28.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-40598
2026-10-03 Alias added: GHSA-6jh4-47v2-4g37

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-40598

Other 4

TI-2017-05251 MantisBT through 2.3.0 allows arbitrary password reset and unauthenticated admin access… CVSS 3.1HIGH 8.8
TI-2014-05966 The XmlImportExport plugin in MantisBT 1.2.17 and earlier allows remote attackers to… CVSS 2.0HIGH 7.5
TI-2026-27192 MantisBT Bugnote Revision Page Leaks Private Issue Metadata After Issue Access Is Revoked CVSS 4.0MEDIUM 5.3
TI-2026-25495 MantisBT: Authorization Bypass in Global Profile Creation CVSS 4.0MEDIUM 5.3
TI-2026-26676 MantisBT: Privilege Escalation from Manager to Administrator CVSS 4.0MEDIUM 5.1
TI-2025-38760 MantisBT unauthorized disclosure of private project column configuration CVSS 4.0MEDIUM 5.3

See all 144 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences