---
id: CVE-2025-11834
title: >-
  The WP AD Gallery plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the 'startindex' parameter of the ad-gallery shortcode in all
  versions up to, and including, 1.3
summary: >-
  The WP AD Gallery plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the 'startindex' parameter of the ad-gallery shortcode in all
  versions up to, and including, 1.3. This is due to insufficient input
  sanitization and …
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'
cwe:
  - CWE-79
published: '2025-10-22'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-11834'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-ad-gallery/tags/1.3/shortcode/shortcode.php#L177
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/0144ae03-00ce-481d-8d29-7a484f1f6cbf?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00193
epssPercentile: 0.08201
ingestedAt: '2026-10-08T11:31:27.486Z'
---

## Overview

The WP AD Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'startindex' parameter of the ad-gallery shortcode in all versions up to, and including, 1.3. This is due to insufficient input sanitization and output escaping. 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.

## Remediation

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