CVE-2026-34754— MantisBT allows unauthorized users to upload attachments to restricted issues via REST API
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-34754
Vulnerability Information
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Vulnerability Title
MantisBT allows unauthorized users to upload attachments to restricted issues via REST API
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior allow an authenticated user to upload attachments to private Issues they are not authorized to access. This issue has been fixed in version 2.28.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mantis Bug Tracker（MantisBT） 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mantis Bug Tracker（MantisBT）是Mantis Bug Tracker开源的一个 bug 跟踪器。 Mantis Bug Tracker 2.28.1及之前版本存在访问控制错误漏洞，该漏洞源于允许已认证用户上传附件到其无权访问的私有问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-34754
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-34754 (2)
Vendor Advisories for CVE-2026-34754 (1)
Same Patch Batch · mantisbt · 2026-05-19 · 7 CVEs total
| CVE-2026-33052 | MantisBT: Authorization Bypass in Global Profile Creation | |
| CVE-2026-34744 | MantisBT authorization bypass allows continued access to self-uploaded attachments on priv | |
| CVE-2026-34463 | MantisBT has Stored HTML Injection/XSS via Clone Issue Form | |
| CVE-2026-34579 | MantisBT has an authorization bypass via private issue monitoring | |
| CVE-2026-34390 | MantisBT: Privilege Escalation from Manager to Administrator | |
| CVE-2026-34970 | MantisBT Bugnote Revision Page Leaks Private Issue Metadata After Issue Access Is Revoked |
IV. Related Vulnerabilities
Same product: mantisbt
- CVE-2026-42071
MantisBT: Private Bugnote Attachment Content Leak via REST A - CVE-2026-42070
MantisBT: Authorization Bypass in Bugnote Editing via Issue - CVE-2026-44655
MantisBT: Stored XSS on Move Attachments Admin Page - CVE-2026-41897
MantisBT: Reflected XSS in Rendering Dynamic Custom Textarea - CVE-2026-44657
MantisBT: Stored XSS in File Download
Same vendor: mantisbt
- CVE-2026-42071
MantisBT: Private Bugnote Attachment Content Leak via REST A - CVE-2026-42070
MantisBT: Authorization Bypass in Bugnote Editing via Issue - CVE-2026-44655
MantisBT: Stored XSS on Move Attachments Admin Page - CVE-2026-41897
MantisBT: Reflected XSS in Rendering Dynamic Custom Textarea - CVE-2026-44657
MantisBT: Stored XSS in File Download
Same weakness: CWE-284
- CVE-2026-10152
TaleLin lin-cms-spring-boot book Endpoint BookController.jav - CVE-2026-45707
n8n-MCP: Multi-tenant MCP requests fall back to process-leve - CVE-2026-49198
Predator Connect W6x: MQTT Broker Access Control - CVE-2026-45296
OpenReplay: Cross-tenant information disclosure in app_apike - CVE-2026-41160
EspoCRM: Broken Access Control / IDOR in Note Pinning API al
V. Comments for CVE-2026-34754
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