EUVD-2026-33027
GHSA-pw5x-2mf9-3xc8
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionGitHub Advisory
A missing authorization check in MantisBT's file visibility function allows any authenticated user (REPORTER+) to download attachments on private bugnotes they should not be able to access, via the REST API endpoint GET /api/rest/issues/{id}/files and SOAP API mc_issue_attachment_get endpoint.
Impact
- REPORTER (access level 25) can view file attachments that were uploaded to private bugnotes by DEVELOPER/MANAGER/ADMIN users
- Private bugnotes are intended for internal developer discussion; their attachments (logs, screenshots, patches) should be equally protected
- The web UI is NOT affected - it filters through bugnote_get_all_visible_bugnotes() first
Patches
- 029d9d203d9e4ae96b3e59d552fa7395cc1e5071
Workarounds
None
Credits
Thanks to the following security researchers for independently discovering and responsibly reporting the issue.
- Vishal Shukla
- Tristan Madani (@TristanInSec) from Talence Security
- Tang Cheuk Hei (@siunam321)
This advisory's contents was largely copied from Tristan's well-written report.
Analysis
A missing authorization check in MantisBT's file visibility function allows any authenticated user (REPORTER+) to download attachments on private bugnotes they should not be able to access, via the REST API endpoint GET /api/rest/issues/{id}/files and SOAP API mc_issue_attachment_get endpoint.
Impact
- REPORTER (access level 25) can view file attachments that were uploaded to private bugnotes by DEVELOPER/MANAGER/ADMIN users
- Private bugnotes are intended for internal developer discussion; their attachments (logs, screenshots, patches) should be equally protected
- The web UI is NOT affected - it filters through bugnote_get_all_visible_bugnotes() first
Patches
- 029d9d203d9e4ae96b3e59d552fa7395cc1e5071
Workarounds
None
Credits
Thanks to the following security researchers for independently discovering and responsibly reporting the issue.
- Vishal Shukla
- Tristan Madani (@TristanInSec) from Talence Security
- Tang Cheuk Hei (@siunam321)
This advisory's contents was largely copied from Tristan's well-written report.
Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today