OnGoSystems WPML Multilingual CMS Plugin up to 4.6.0 wp-login.php wp_lang cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in OnGoSystems WPML Multilingual CMS Plugin up to 4.6.0. Affected by this issue is some unknown functionality of the file wp-login.php. The manipulation of the argument wp_lang leads to cross site scripting. This vulnerability is documented as CVE-2023-54413. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in OnGoSystems WPML Multilingual CMS Plugin up to 4.6.0. This issue affects an unknown code of the file wp-login.php. The manipulation of the argument wp_lang with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

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.

The advisory is shared at wpml.org. The identification of this vulnerability is CVE-2023-54413 since 10/14/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

By approaching the search of inurl:wp-login.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 4.6.1 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• OnGoSystems

Name

• WPML Multilingual CMS Plugin

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6.0

CPE 2.3info

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CPE 2.2info

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