Cross-site scripting in Spam protection, AntiSpam, FireWall by CleanTalk plugin for WordPress

1) Cross-site scripting

EUVDB-ID: #VU22776

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-17515

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 passed via the "from" or "till" parameter in "inc/cleantalk-users.php" and "inc/cleantalk-comments.php" files. 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

Install update from vendor's website.

Vulnerable software versions

Spam protection, AntiSpam, FireWall by CleanTalk: 2.4.9 - 5.127.4

CPE2.3

• cpe:2.3:a:znaeff:cleantalk-spam-protect:2.4.9:*:*:*:*:wordpress:*:*
• cpe:2.3:a:znaeff:cleantalk-spam-protect:2.4.10:*:*:*:*:wordpress:*:*
• cpe:2.3:a:znaeff:cleantalk-spam-protect:2.4.11:*:*:*:*:wordpress:*:*

External links

http://plugins.trac.wordpress.org/changeset/2172333
http://wordpress.org/plugins/cleantalk-spam-protect/#developers

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.