Risk Letters

Exploited vulnerability

CVE-2023-54413

TLP:CLEAR

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

WPML Multilingual CMS plugin for WordPress before 4.6.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject script by supplying crafted input in the wp_lang parameter. Attackers can lure users to /wp-login.php with a wp_lang value injecting an image input with an obfuscated onfocus handler to execute JavaScript in the victim's browser. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-11-12.

Facts

  • Vendor: OnTheGoSystems
  • Product: WPML Multilingual CMS
  • EPSS (probability of exploitation within 30 days): 0.2 %
  • First known exploitation: 22 October 2026
  • First seen by Risk Letters: 22 October 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD