# Projectopia – WordPress Project Management <= 5.1.25.2 - Unauthenticated Missing Authorization to Arbitrary User Deletion via Client Contact Removal

- **ID:** WPSEC-2026-1953
- **Plugin:** Projectopia – Project Management Tool (`projectopia-core`), https://wordpress.org/plugins/projectopia-core/
- **Affected versions:** all versions before 5.1.26
- **Fixed in:** 5.1.26 (Update to 5.1.26 or later.)
- **Severity:** High 8.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H)
- **Weakness:** CWE-862
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-29)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/projectopia-core
- **Fix released:** 2026-10-28
- **Published:** 2026-10-29
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1953/

## Description

The Projectopia plugin for WordPress is vulnerable to unauthorized user deletion via the pto_remove_client_contact AJAX action in all versions up to, and including, 5.1.25.2. This is due to a missing capability and ownership check, and to the handler not confirming that the target account is an ordinary contact. The action was registered for unauthenticated users and was protected only by a nonce that is printed on public form pages. This makes it possible for unauthenticated attackers to delete the WordPress accounts listed as contacts on any client record.

## References

- https://wpsec.com/vuln/WPSEC-2026-1953/
- https://plugins.svn.wordpress.org/projectopia-core/tags/5.1.26/
- https://wordpress.org/plugins/projectopia-core/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1953/

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.