---
id: CVE-2026-103481
title: >-
  The Gwolle Guestbook plugin for WordPress is vulnerable to Reflected
  Cross-Site Scripting via the 'permalink' parameter in all versions up to, and
  including, 5.1.1 due to insufficient input sanitization and output escaping
summary: >-
  The Gwolle Guestbook plugin for WordPress is vulnerable to Reflected
  Cross-Site Scripting via the 'permalink' parameter in all versions up to, and
  including, 5.1.1 due to insufficient input sanitization and output escaping.
  This makes it…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: mpol
product: Gwolle Guestbook
affected:
  - gwolle_guestbook <= 5.1.1
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:17:02.040'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103481'
references:
  - url: >-
      https://codeberg.org/cyclotouriste/gwolle-gb/commit/f6e483654b56188a3fa208fd18a4f0468577a825
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-ajax-infinite-scroll.php#L96
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-permalink.php#L21
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-permalink.php#L28
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/d8eff266-43fe-4636-b4ef-c973db7e7952?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
epss: 0.00211
epssPercentile: 0.11245
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T14:34:46.138486Z'
ingestedAt: '2026-10-16T04:58:47.492Z'
---

## Overview

The Gwolle Guestbook plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'permalink' parameter in all versions up to, and including, 5.1.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

## Remediation

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