# Seraphinite Post .DOCX Source <= 2.16.15 - Authenticated (Subscriber+) Missing Authorization to Plugin State Modification

- **ID:** WPSEC-2026-1206
- **Plugin:** Seraphinite Post .DOCX Source (`seraphinite-post-docx-source`), https://wordpress.org/plugins/seraphinite-post-docx-source/
- **Affected versions:** all versions before 2.16.16
- **Fixed in:** 2.16.16 (Update to 2.16.16 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-862
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-17)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/seraphinite-post-docx-source
- **Fix released:** 2026-10-16
- **Published:** 2026-10-17
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1206/

## Description

The Seraphinite Post .DOCX Source plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the OnAdminApi_StateSet function, reachable through the 'seraph_pds_api' AJAX action, in all versions up to, and including, 2.16.15. This makes it possible for authenticated attackers, with Subscriber-level access and above, to add, change or remove arbitrary fields of the plugin's stored state. For example, they can remove the accepted EULA version, which puts the plugin into a non-functional mode until an administrator accepts the EULA again.

## References

- https://wpsec.com/vuln/WPSEC-2026-1206/
- https://plugins.svn.wordpress.org/seraphinite-post-docx-source/tags/2.16.16/
- https://wordpress.org/plugins/seraphinite-post-docx-source/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1206/

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.