#VU43736 Cross-site scripting in MyBB - CVE-2012-2326

Vulnerability identifier: #VU43736

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2012-2326

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MyBB
Other software / Other software solutions

Vendor: MyBB Group

Description

Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error in the Admin Control Panel (ACP) in MyBB (aka MyBulletinBoard) before 1.6.7 when processing a malformed file name in an orphaned attachment. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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

MyBB: 1.0 - 1.6.5

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External links
https://blog.mybb.com/2012/04/01/mybb-1-6-7-update-1-8-development/
https://www.openwall.com/lists/oss-security/2012/05/07/13
https://www.openwall.com/lists/oss-security/2012/05/07/14
https://www.securityfocus.com/bid/53417

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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.