---
id: CVE-2026-101920
title: >-
  The Molongui Authorship – Author Boxes, Guest Authors & Co-Authors for
  WordPress plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site
  Scripting via the 'comment (href attribute inside comment content)' parameter
  in all versi…
summary: >-
  The Molongui Authorship – Author Boxes, Guest Authors & Co-Authors for
  WordPress plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site
  Scripting via the 'comment (href attribute inside comment content)' parameter
  in all versi…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2026-10-10'
updated: '2026-10-10'
sourceUpdated: '2026-10-10T08:17:03.213'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101920'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/molongui-authorship/tags/5.2.12/assets/js/byline.4cc4.min.js
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/molongui-authorship/tags/5.2.12/includes/author-filters.php#L29
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/molongui-authorship/tags/5.2.12/includes/author-filters.php#L464
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/molongui-authorship/tags/5.3.0/assets/js/byline.849a.min.js
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/1bf63dd3-9fd1-4b72-b7e0-48155312c48f?source=cve
    label: security@wordfence.com
tags:
  - nvd
ingestedAt: '2026-10-10T08:27:37.783Z'
---

## Overview

The Molongui Authorship – Author Boxes, Guest Authors & Co-Authors for WordPress plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'comment (href attribute inside comment content)' parameter in all versions up to, and including, 5.2.12 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable in the free build because the plugin's author-filter rewriter never appends the ?m_bm=true marker to its own anchors (Plugin::has_pro() returns false), meaning every href the byline script selects and rewrites is fully attacker-controlled.

## Remediation

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