# Blocksy Companion <= 2.1.58 - Authenticated (Contributor+) Sensitive Information Exposure via blocksy_posts Shortcode

- **ID:** WPSEC-2026-0686
- **Plugin:** Blocksy Companion (`blocksy-companion`), https://wordpress.org/plugins/blocksy-companion/
- **Affected versions:** all versions before 2.1.59
- **Fixed in:** 2.1.59 (Update to 2.1.59 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 Medium, affected versions Medium (as of 2026-10-10)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/blocksy-companion
- **Fix released:** 2026-10-08
- **Published:** 2026-10-10
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0686/

## Description

The Blocksy Companion plugin for WordPress is vulnerable to Sensitive Information Exposure via the blocksy_posts shortcode and posts block in all versions up to, and including, 2.1.58. This is due to the plugin accepting arbitrary post types, including non-viewable ones, and allowing filtering by protected meta keys and values supplied in shortcode attributes. This makes it possible for authenticated attackers with Contributor-level access and above to list content from non-public post types and infer protected post meta values.

## References

- https://wpsec.com/vuln/WPSEC-2026-0686/
- https://plugins.svn.wordpress.org/blocksy-companion/tags/2.1.59/
- https://wordpress.org/plugins/blocksy-companion/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0686/

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.