Improper access control in vBulletin

Published: 2020-05-12
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-12720
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Web applications / Forum & blogging software

Vendor vBulletin

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper access control

EUVDB-ID: #VU27705

Risk: Medium

CVSSv3.1: 6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C]

CVE-ID: CVE-2020-12720

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: Yes


The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions. A remote attacker can send a specially crafted request and gain unauthorized access to the affected application.


Install update from vendor's website.

Vulnerable software versions

vBulletin: 5.5.0, 5.5.1, 5.5.2, 5.5.2 Patch Level 1, 5.5.2 Patch Level 2, 5.5.3, 5.5.3 Patch Level 1, 5.5.3 Patch Level 2, 5.5.4, 5.5.4 Patch Level 1, 5.5.4 Patch Level 2, 5.5.5, 5.5.6, 5.6.0, 5.6.1

CPE2.3 External links

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. However, a fully functional exploit for this vulnerability is available.