Cross-site scripting in Launcher: Coming Soon & Maintenance Mode - CVE-2019-7411

Detailed vulnerability description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed via fields as follows: (1) Title, (2) Favicon, (3) Meta Description, (4) Subscribe Form (Name field label, Last name field label, Email field label), (5) Contact Form (Name field label and Email field label), and (6) Social Links (Facebook Page URL, Twitter Page URL, Instagram Page URL, YouTube Page URL, Linkedin Page URL, Google+ Page URL, RSS URL). A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

How to mitigate CVE-2019-7411

Sources

• https://metamorfosec.com/Files/Advisories/METS-2019-002-Multiple_Stored_XSS_Vulnerabilities_in_the_MyThemeShop_Launcher_plugin_v1.0.8_for_WordPress.txt
• https://plugins.trac.wordpress.org/changeset/2028849/launcher