# wpForo Forum <= 3.2.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Attachment File Name

- **ID:** WPSEC-2026-3156
- **Plugin:** wpForo Forum (`wpforo`), https://wordpress.org/plugins/wpforo/
- **Affected versions:** all versions before 3.2.5
- **Fixed in:** 3.2.5 (Update to 3.2.5 or later.)
- **Severity:** Medium 6.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-15)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/wpforo
- **Fix released:** 2026-11-14
- **Published:** 2026-11-15
- **URL:** https://wpsec.com/vuln/WPSEC-2026-3156/

## Description

The wpForo Forum plugin for WordPress is vulnerable to Stored Cross-Site Scripting via attachment file names in forum post content in all versions up to, and including, 3.2.4. This is due to the attachment file name being URL-decoded and printed without output escaping when the post is displayed to users who are not permitted to view attachments. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in forum posts that will execute whenever such a user accesses the post.

## References

- https://wpsec.com/vuln/WPSEC-2026-3156/
- https://plugins.svn.wordpress.org/wpforo/tags/3.2.5/
- https://wordpress.org/plugins/wpforo/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-3156/

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.