Stored XSS in Schiocco Support Board for WordPress

1) Stored cross-site scripting

EUVDB-ID: #VU15396

Risk: Medium

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-18373

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 in file upload areas in the Chat and Help Desk sections via the "msg" in the "/wp-admin/admin-ajax.php", when action is set to "sb_ajax_add_message". A remote attacker can store the XSS payload in the database, trick the victim to visit a compromised page 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

Support Board - Chat And Help Desk: 1.2.3

External links

http://packetstormsecurity.com/files/149806/WordPress-Support-Board-1.2.3-Cross-Site-Scripting.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.