Cross-site scripting in MyThemeShop Launcher: Coming Soon & Maintenance Mode for WordPress

1) Cross-site scripting

EUVDB-ID: #VU19631

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-7411

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

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.

Mitigation

Update to version 1.0.11.

Vulnerable software versions

Launcher: Coming Soon & Maintenance Mode: 1.0 - 1.0.10

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.