Co-Authors Plus <= 4.1.3 - Unauthenticated Sensitive Information Exposure via '/wp/v2/coauthors' REST Route

ID

WPSEC-2026-2330

Plugin

Co-Authors Plus (co-authors-plus)

Affected

from 3.5 before 4.2.0

Remediation

Update to 4.2.0 or later.

CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness

CWE-200

Usage

Plugin Medium · Affected versions Low among sites WPSec scans, 2026-11-03

Attack surface

Co-Authors Plus on WPSec AttackSurface

Fix released

2026-10-30

Published

2026-11-03

Description

The Co-Authors Plus plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 4.1.3 via the '/wp/v2/coauthors' REST route. The author taxonomy was exposed through the default core terms controller without any permission check, and author term names are user logins. This makes it possible for unauthenticated attackers to enumerate the login names of users on the site, which WordPress core otherwise keeps out of anonymous REST responses.

References

• https://wpsec.com/vuln/WPSEC-2026-2330/
• https://plugins.svn.wordpress.org/co-authors-plus/tags/4.2.0/
• https://wordpress.org/plugins/co-authors-plus/

Published by WPSec. Provided as is, without warranty. Corrections: contact us.

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