Cross-site scripting in vBulletin

1) Cross-site scripting

EUVDB-ID: #VU80953

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-2023-39777

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 the Admin Control Panel in the /login.php?do=login url parameter. 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

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

vBulletin: 5.0 - 6.0.0

CPE2.3

• cpe:2.3:a:vbulletin:vbulletin:5.0:*:*:*:*:*:*:*
• cpe:2.3:a:vbulletin:vbulletin:5.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:vbulletin:vbulletin:5.0.1:*:*:*:*:*:*:*

External links

https://gist.github.com/GiongfNef/8fe658dce4c7fcf3a7b4e6387e50141c

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.