Multiple vulnerabilities in Popup Builder – Responsive WordPress Pop up – Subscription & Newsletter plugin

Published: 2020-03-13

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-10196 CVE-2020-10195
CWE-ID	CWE-79 CWE-284
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Popup Builder – Responsive WordPress Pop up – Subscription & Newsletter Web applications / Modules and components for CMS
Vendor	Sygnoos

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Stored cross-site scripting

EUVDB-ID: #VU26054

Risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10196

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

Exploit availability: No

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data passed via the "allPopupData" parameter in "wp-admin/admin-ajax.php". 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 - 3.63

External links

http://wpvulndb.com/vulnerabilities/10127/
http://www.wordfence.com/blog/2020/03/vulnerabilities-patched-in-popup-builder-plugin-affecting-over-100000-sites/

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.

2) Improper access control

EUVDB-ID: #VU26055

Risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10195

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in several actions. A remote authenticated attacker can send a specially crafted HTTP POST request and export a list of all newsletter subscribers, export system configuration information and grant themselves access to various features of the plugin.

The vulnerable actions included:

add_action('admin_post_csv_file', array($this, 'getSubscribersCsvFile'));

add_action('admin_post_sgpb_system_info', array($this, 'getSystemInfoFile'));

add_action('admin_post_sgpbSaveSettings', array($this, 'saveSettings'), 10, 1);