# Nexter Extension <= 4.7.12 - Authenticated (Contributor+) Sensitive Information Exposure via Display Conditions Pickers

- **ID:** WPSEC-2026-1083
- **Plugin:** Nexter Extension – Security, Performance, Code Snippets & Site Toolkit (`nexter-extension`), https://wordpress.org/plugins/nexter-extension/
- **Affected versions:** all versions before 4.7.13
- **Fixed in:** 4.7.13 (Update to 4.7.13 or later.)
- **Severity:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
- **Weakness:** CWE-200
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-16)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/nexter-extension
- **Fix released:** 2026-10-15
- **Published:** 2026-10-16
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1083/

## Description

The Nexter Extension plugin for WordPress is vulnerable to Sensitive Information Exposure via the Display Conditions pickers ('nxt_singular_archives_filters_ajax' AJAX action) in all versions up to, and including, 4.7.12. This is due to the action passing request-supplied WP_Query and WP_User_Query arguments through and returning the results without checking that the user can read each returned post or has the list_users capability. This makes it possible for authenticated attackers with Contributor-level access and above to see the titles of other users' private, draft and pending posts and to list the site's users.

## References

- https://wpsec.com/vuln/WPSEC-2026-1083/
- https://plugins.svn.wordpress.org/nexter-extension/tags/4.7.13/
- https://wordpress.org/plugins/nexter-extension/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1083/

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.