---
id: CVE-2026-111592
title: >-
  Co-Authors, Multiple Authors and Guest Authors in an Author Box with
  PublishPress Authors <= 4.17.0 - Authenticated (Subscriber+) Stored Cross-Site
  Scripting via display_name profile-sync into author term name
summary: >-
  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 'name (maps to display_name)' parameter in all versions up
  to, and in…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: publishpress
product: >-
  Co-Authors, Multiple Authors and Guest Authors in an Author Box with
  PublishPress Authors
affected:
  - >-
    co-authors_multiple_authors_and_guest_authors_in_an_author_box_with_publishpress_authors
    <= 4.17.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-01T17:34:24.057048Z'
published: '2026-10-31'
updated: '2026-11-01'
sourceUpdated: '2026-11-01T17:44:28.119Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111592'
references:
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/329226bc-7d0e-45e0-8ac0-656517e0e4ca?source=cve
  - url: >-
      https://plugins.trac.wordpress.org/browser/publishpress-authors/tags/4.17.0/src/core/Classes/Author_Editor.php#L86
  - url: >-
      https://plugins.trac.wordpress.org/browser/publishpress-authors/tags/4.17.0/src/modules/multiple-authors/multiple-authors.php#L5233
  - url: >-
      https://plugins.trac.wordpress.org/browser/publishpress-authors/tags/4.17.0/src/modules/multiple-authors/multiple-authors.php#L302
  - url: >-
      https://plugins.trac.wordpress.org/browser/publishpress-authors/tags/4.18.0/src/core/Classes/Author_Editor.php
tags:
  - cve.org
epss: 0.00193
epssPercentile: 0.09109
ingestedAt: '2026-11-05T19:30:42.595Z'
---

## Overview

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 'name (maps to display_name)' parameter in all versions up to, and including, 4.17.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the attacker's user account to have a mapped author term, which occurs when an administrator has assigned them as a co-author on content or has enabled automatic author term creation for their role — this mapping is not present by default for new users on a stock install.

## Affected

- `co-authors_multiple_authors_and_guest_authors_in_an_author_box_with_publishpress_authors <= 4.17.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.