vBulletin is a popular commercial internet forum software package, developed to enable community members to communicate with each other via online discussions, messaging and posting of user-generated content. It is a widely adopted platform, powering thousands of online communities across different industries including gaming, entertainment, health and news. The security and privacy of the user-generated content and the overall performance of these forums are critical to the success of any online community.
Recently, a vulnerability known as CVE-2020-17496 has been detected in vBulletin software versions between 5.5.4 through 5.6.2. The vulnerability allows remote code execution through a specific structure within the ajax/render/widget_tabbedcontainer_tab_panel request. This means that by exploiting this vulnerability, an attacker can gain unauthorized access to the forum server and execute arbitrary code with potentially devastating effects.
When successfully exploited, the CVE-2020-17496 vulnerability can lead to severe damage to the forum community members. Attackers can potentially take over the entire forum, gain access to user’s login credentials and personal information, read private messages and spread malicious content to the users. If the attacker is a seasoned hacker, they can use the server as a launching pad to further penetrate deeper into the organization's network resulting in complete data loss or extortion demands.
At Security Foreveryone, we provide specialized and efficient tools to monitor your website’s security posture and detect any possible vulnerabilities that might exist within your digital assets. Thanks to the proactive features of our platform, our users can quickly and efficiently learn about the threats they are facing and act accordingly to minimize any potential damage.
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To protect against CVE-2020-17496, vBulletin website owners should take some basic precautionary measures, especially if their website is using versions 5.5.4 through 5.6.2. These measures include:
- Apply the recent security patch released in version 5.6.3 and configure automatic updates if possible.
- Consider employing a web application firewall to prevent code injection, including malicious file upload or remote code execution attempts.
- Strengthen user authentication and access control measures.
- Limit external exposure to users who have genuine reasons for accessing the server.
- Regularly audit all server log files to detect any unusual traffic or activity.
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