# GD bbPress Attachments <= 4.9.4 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary Attachment Deletion

- **ID:** WPSEC-2026-1669
- **Plugin:** forumAttachments for bbPress (`gd-bbpress-attachments`), https://wordpress.org/plugins/gd-bbpress-attachments/
- **Affected versions:** all versions before 5.0
- **Fixed in:** 5.0 (Update to 5.0 or later.)
- **Severity:** Medium 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L)
- **Weakness:** CWE-639
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-27)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/gd-bbpress-attachments
- **Fix released:** 2026-10-25
- **Published:** 2026-10-26
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1669/

## Description

The forumAttachments for bbPress plugin for WordPress is vulnerable to Insecure Direct Object Reference via the attachment delete/detach action in all versions up to, and including, 4.9.4, due to the handler only verifying that the current user authored the bbPress topic or reply supplied in 'bbp_id', without checking that the object supplied in 'att_id' is an attachment belonging to that post or to the user. This makes it possible for authenticated attackers with Subscriber-level access and above who have authored a topic or reply to delete arbitrary media library attachments, or reset the parent of arbitrary posts, when the site allows authors to delete or detach their own attachments.

## References

- https://wpsec.com/vuln/WPSEC-2026-1669/
- https://plugins.svn.wordpress.org/gd-bbpress-attachments/tags/5.0/
- https://wordpress.org/plugins/gd-bbpress-attachments/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1669/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.