#VU21937 Stored cross-site scripting in Popup Builder - Responsive WordPress Pop up - Subscription & Newsletter

Vulnerability identifier: #VU21937

Vulnerability risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear]

CVE-ID: N/A

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Popup Builder - Responsive WordPress Pop up - Subscription & Newsletter
Web applications / Modules and components for CMS

Vendor: Sygnoos

Description

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

The vulnerability exists "Add Post" or "Add Page" due to insufficient sanitization of user-supplied data passed via the HTTP GET parameter to the "/wordpress/wp-admin/post-new.php" script. A remote attacker can inject 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
Install updates from vendor's website.

Vulnerable software versions

Popup Builder - Responsive WordPress Pop up - Subscription & Newsletter: 1.1.4 - 3.49

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External links
https://www.exploit-db.com/exploits/47518/

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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. However, proof of concept for this vulnerability is available.