Vulnerability identifier: #VU21601

Vulnerability risk: Low

CVSSv3.1: 3.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17271

CWE-ID: CWE-89

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
vBulletin
Web applications / Forum & blogging software

Vendor: vBulletin

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 passed via "where" parameter to "ajax/api/hook/getHookList" or "ajax/api/widget/getWidgetList" API endpoints. A remote authenticated attacker with "canadminproducts", "canadminstyles" (1) or "canusesitebuilder" (2) permissions can send a specially crafted request to the affected application and execute arbitrary SQL commands within the application database.

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 updates from vendor's website.

Vulnerable software versions

vBulletin: 5.5.0 - 5.5.4 Patch Level 1

---

External links
http://karmainsecurity.com/KIS-2019-01
http://seclists.org/fulldisclosure/2019/Oct/8

---

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.