CVEvulnerability
CVE-2026-39903
7.1 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2026-07-10
- Last modified
- 2026-10-25
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 7.1 HIGH — CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/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
- CVSS 3.1 ([email protected])
- 7.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
- Weaknesses
- CWE-863
Description
Simple Machines Forum 2.1 prior to commit 7d048f8 and 3.0 prior to commit a7875e8 contains an authorization bypass vulnerability in Sources/Actions/AttachmentApprove.php where a single-character operator error causes the permission check to always pass regardless of user permissions. An authenticated low-privileged user can approve, reject, or delete any pending attachments on any board without holding the required approve_posts permission, bypass moderation queues for their own uploads, and enumerate and delete other users' pending attachments.
Related
Weakness · CWE (1)
- CWE-863 Incorrect Authorization weakness
References
- https://github.com/SimpleMachines/SMF/commit/7d048f8d66aab9af51cd6ee110fbad103cf673e8 github.com
- https://github.com/SimpleMachines/SMF/commit/a7875e876a647572dd4c45da881b875092caac3d github.com
- https://github.com/SimpleMachines/SMF/pull/9181 github.com
- https://github.com/SimpleMachines/SMF/pull/9182 github.com
- https://www.vulncheck.com/advisories/simple-machines-forum-authorization-bypass-via-attachmentapprove-php www.vulncheck.com