# Co-Authors Plus <= 4.2.1 - Authenticated (Contributor+) Sensitive Information Exposure via Posts List Co-Authors Column

- **ID:** WPSEC-2026-2745
- **Plugin:** Co-Authors Plus (`co-authors-plus`), https://wordpress.org/plugins/co-authors-plus/
- **Affected versions:** all versions before 4.2.2
- **Fixed in:** 4.2.2 (Update to 4.2.2 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 2026-11-08)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/co-authors-plus
- **Fix released:** 2026-11-07
- **Published:** 2026-11-08
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2745/

## Description

The Co-Authors Plus plugin for WordPress is vulnerable to Sensitive Information Exposure via the co-authors column of the admin posts list in all versions up to, and including, 4.2.1, due to the column printing each co-author's email address and login in data attributes for every user who can view the list, not only for users who can set authors. This makes it possible for authenticated attackers with Contributor-level access and above to obtain the email addresses and usernames of other authors and guest authors.

## References

- https://wpsec.com/vuln/WPSEC-2026-2745/
- https://plugins.svn.wordpress.org/co-authors-plus/tags/4.2.2/
- https://wordpress.org/plugins/co-authors-plus/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2745/

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.