A vulnerability was found in Z-URL Preview Plugin 1.6.1 on WordPress (WordPress Plugin) and classified as problematic. Affected by this issue is some unknown functionality of the file class.zlinkpreview.php. The manipulation of the argument url as part of a Parameter leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The software 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. CVE summarizes:

The Z-URL Preview plugin 1.6.1 for WordPress has XSS via the class.zlinkpreview.php url parameter.

The bug was discovered 12/05/2017. The weakness was presented 01/01/2018 (Website). The advisory is available at packetstormsecurity.com. This vulnerability is handled as CVE-2017-18012 since 01/01/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 27 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:class.zlinkpreview.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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• WordPress Plugin

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• Z-URL Preview Plugin

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