# Stream <= 4.4.0 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Records Screen User Filter

- **ID:** WPSEC-2026-3054
- **Plugin:** Stream – Activity Log & Audit Trail (`stream`), https://wordpress.org/plugins/stream/
- **Affected versions:** all versions before 4.5.0
- **Fixed in:** 4.5.0 (Update to 4.5.0 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 High, affected versions High (as of 2026-11-13)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/stream
- **Fix released:** 2026-11-12
- **Published:** 2026-11-13
- **URL:** https://wpsec.com/vuln/WPSEC-2026-3054/

## Description

The Stream plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the user filter on the Stream records screen in all versions up to, and including, 4.4.0 due to insufficient output escaping of user-controlled user labels (such as display names) rendered in the user filter dropdown. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts that will execute whenever an administrator or other privileged user accesses the Stream records screen.

## References

- https://wpsec.com/vuln/WPSEC-2026-3054/
- https://plugins.svn.wordpress.org/stream/tags/4.5.0/
- https://wordpress.org/plugins/stream/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-3054/

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.