---
id: CVE-2025-9854
title: >-
  The A Simple Multilanguage Plugin plugin for WordPress is vulnerable to Stored
  Cross-Site Scripting via the plugin's 'asmp-switcher' shortcode in all
  versions up to, and including, 1.0 due to insufficient input sanitization and
  output es…
summary: >-
  The A Simple Multilanguage Plugin plugin for WordPress is vulnerable to Stored
  Cross-Site Scripting via the plugin's 'asmp-switcher' shortcode in all
  versions up to, and including, 1.0 due to insufficient input sanitization and
  output es…
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: '2025-10-03'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:10:00.563'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-9854'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/a-simple-multilanguage/trunk/a-simple-multilang.php#L315
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/77033d00-f794-4dbe-9454-17c312855491?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00193
epssPercentile: 0.08196
ingestedAt: '2026-10-08T22:11:53.770Z'
---

## Overview

The A Simple Multilanguage Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'asmp-switcher' shortcode in all versions up to, and including, 1.0 due to insufficient input sanitization and output escaping on user supplied attributes. 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.