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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Active
User action required
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabili…
disclosure@vulncheck.com
https://wpml.org/changelog/2023/03/wpml-4-6-1-important-security-update/
disclosure@vulncheck.com
https://wpscan.com/vulnerability/b9cc519c-7ec2-42c3-9f42-01e928e12139/
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/wpml-multilingual-cms-wordpress-plugin-4.6…
disclosure@vulncheck.com