Many WordPress websites rely on plugins to extend their functionality, and the wpForo Forum plugin is a popular choice for building community forums. However, a serious security vulnerability has been discovered within the wpForo Forum plugin, identified as CVE-2026-28562. This flaw is an unauthenticated SQL injection, a type of attack that could allow unauthorized individuals to access and extract sensitive data directly from your WordPress database. This means an attacker doesn’t need to be logged in or have any special user privileges to exploit this weakness. It’s a critical concern for site administrators and anyone using the affected versions of the plugin.
CVE Details
Understanding the specifics of any vulnerability is key to effective defense. Here’s a breakdown of the technical details for CVE-2026-28562:
- Product Name: wpForo Forum
- CVE ID: CVE-2026-28562
- Published Date: February 28, 2026
- Severity: High
- Status: Analyzed
Affected Products
The unauthenticated SQL injection vulnerability, CVE-2026-28562, specifically impacts the wpForo Forum plugin for WordPress. Installations running version 2.4.14 and all earlier versions are at significant risk. The root of this problem lies in the Topics::get_topics() function, where the ORDER BY clause doesn’t properly sanitize user-supplied input. This oversight allows attackers to manipulate the wpfob parameter, injecting malicious SQL queries. This is why keeping your plugins up-to-date is so vital for your site’s health and security.
Current Status
This vulnerability is officially listed as ‘Analyzed,’ indicating that security researchers and the public are fully aware of its details and implications. The ‘Analyzed’ status confirms that the vulnerability has been investigated, its nature understood, and information regarding it is publicly available. For site owners, this means immediate action is necessary to prevent potential exploitation.
Severity Level
With a ‘High’ severity rating, CVE-2026-28562 demands prompt attention. An unauthenticated SQL injection is one of the most dangerous types of web vulnerabilities because it allows attackers to bypass login mechanisms entirely. Exploiting this flaw, adversaries can employ ‘CASE WHEN’ payloads to conduct ‘blind boolean extraction.’ In simpler terms, this technique allows them to systematically guess and retrieve confidential data, such as usernames, passwords, and other critical information, directly from your WordPress database. The ability for an attacker to gain such deep access without any form of authentication makes this a very serious threat.
Possible Solutions
Protecting your WordPress website from this critical SQL injection vulnerability requires immediate action. The most effective solution is to update your wpForo Forum plugin to the latest available secure version.
Based on the changelog, wpForo Forum version 2.4.16, released on February 28, 2026, addresses multiple security issues. While CVE-2026-28562 specifically points to version 2.4.14, subsequent updates typically include cumulative fixes. Therefore, it is strongly recommended that all users of wpForo Forum update their plugin to version 2.4.16 or any newer version available. Before initiating any plugin updates, always create a full backup of your WordPress site to ensure you can restore it if any unexpected issues arise. Regular updates are the best defense against evolving cyber threats.
References
For further technical details and official advisories, please consult the following resources:
- https://wordpress.org/plugins/wpforo/
- https://wordpress.org/plugins/wpforo/#developers
- https://www.vulncheck.com/advisories/wpforo-sql-injection-via-topics-order-by-parameter
