Co-Authors, Multiple Authors and Guest Authors in an Author Box with PublishPress Authors <= 4.17.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Author Data Shortcode 'separator' Attribute

ID

WPSEC-2026-1750

Plugin

Co-Authors, Multiple Authors and Guest Authors in an Author Box with PublishPress Authors (publishpress-authors)

Affected

all versions before 4.18.0

Remediation

Update to 4.18.0 or later.

CVSS 3.1

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

Weakness

CWE-79

Usage

Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-27

Attack surface

Co-Authors, Multiple Authors and Guest Authors in an Author Box with PublishPress Authors on WPSec AttackSurface

Fix released

2026-10-26

Published

2026-10-27

Description

The Co-Authors, Multiple Authors and Guest Authors in an Author Box with PublishPress Authors plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'separator' attribute of the author data shortcode in all versions up to, and including, 4.17.0 due to insufficient input sanitization and output escaping when joining author field values. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

References

• https://wpsec.com/vuln/WPSEC-2026-1750/
• https://plugins.svn.wordpress.org/publishpress-authors/tags/4.18.0/
• https://wordpress.org/plugins/publishpress-authors/

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

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