CVE-2008-3069

Vulnerability

MyBB versions prior to 1.2.13 contain multiple cross-site scripting (XSS) vulnerabilities in portal.php and inc/functions_post.php. The exact parameters are unspecified, but the flaws allow injection of arbitrary web script or HTML. [1][2]

Exploitation

An attacker can exploit these vulnerabilities by sending crafted requests to the affected pages with malicious script in the unspecified parameters. No authentication is required, as the vulnerable endpoints are publicly accessible. The attacker does not need any special privileges; user interaction is not required for the injection to occur, but the injected script executes in the context of the victim's browser when they view the affected page.

Impact

Successful exploitation allows remote attackers to inject arbitrary web script or HTML, leading to potential information disclosure, session hijacking, or defacement. The impact is limited to the browser context of the victim user.

Mitigation

The vulnerability is fixed in MyBB version 1.2.13. Users should upgrade to this version or later. No workarounds are documented in the available references. [1][2]