SQL injection in Popup Builder plugin for WordPress

1) SQL injection

EUVDB-ID: #VU25412

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-9006

CWE-ID: CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary SQL queries in database.

The vulnerability exists due to insufficient sanitization of user-supplied data in the "sgImportPopups" function in "sg_popup_ajax.php". A remote attacker can send a specially crafted request to the affected application and execute arbitrary SQL commands within the application database via PHP Deserialization on attacker-controlled data with the attachmentUrl POST variable.

Successful exploitation of this vulnerability may allow a remote attacker to read, delete, modify data in database and gain complete control over the affected application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Popup Builder – Responsive WordPress Pop up – Subscription & Newsletter: 2.2.8 - 2.6.7.6

External links

http://plugins.trac.wordpress.org/browser/popup-builder/tags/2.2.8/files/sg_popup_ajax.php#L69
http://wordpress.org/plugins/popup-builder/#developers
http://wpvulndb.com/vulnerabilities/10073
http://zeroauth.ltd/blog/2020/02/16/cve-2020-9006-popup-builder-wp-plugin-sql-injection-via-php-deserialization/

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.