Multiple vulnerabilities in Email Subscribers & Newsletters plugin for WordPress

Published: 2020-07-20

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-5768 CVE-2020-5767
CWE-ID	CWE-89 CWE-352
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Email Subscribers & Newsletters Web applications / Modules and components for CMS
Vendor	icegram

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) SQL injection

EUVDB-ID: #VU31679

Risk: Low

CVSSv3.1: 4.4 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-5768

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

Exploit availability: No

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data in the "es_newsletters_settings_callback()" function in "class-es-newsletters.php". A remote administrator can send a specially crafted request and disclose potentially sensitive information such as value of database fields.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Email Subscribers & Newsletters: 4.4.8 - 4.5.0.1

External links

http://www.tenable.com/security/research/tra-2020-44-0
http://wpvulndb.com/vulnerabilities/10322/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user 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.

2) Cross-site request forgery

EUVDB-ID: #VU31680

Risk: Low

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

CVE-ID: CVE-2020-5767

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin in the "send_test_email()" function in "class-es-mailer.php". A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.