Platform
php
Component
xenforo
Fixed in
2.3.7
CVE-2025-71281 describes a method restriction bypass vulnerability in XenForo. This flaw allows unauthorized method invocations from within templates due to insufficient validation of callable methods. This can lead to unintended actions or information disclosure. The vulnerability affects XenForo versions 2.3.0 through 2.3.7 and is fixed in version 2.3.7.
CVE-2025-71281 in XenForo, rated with a CVSS score of 8.8, stems from inadequate restrictions on methods callable from within templates. Previously, XenForo used a loose prefix match instead of a stricter first-word match for determining which methods were accessible through callbacks and variable method calls in templates. This could allow an attacker to invoke unauthorized methods, potentially compromising the forum’s security. The primary impact is the possibility of remote code execution or sensitive data manipulation, depending on the exposed methods and the attacker's user permissions. The vulnerability’s severity is due to the potential ease of exploitation and the significant impact it could have on the forum's confidentiality, integrity, and availability.
An attacker could exploit this vulnerability by crafting malicious custom templates or modifying existing ones to include calls to unauthorized methods. The key lies in the loose prefix matching, which allows an attacker to trick the system into invoking methods that would normally be restricted. The success of exploitation will depend on the forum’s context, the attacker’s user permissions, and the specific methods exposed. Exploitation could involve injecting malicious code into templates, potentially allowing the attacker to execute commands on the server or access sensitive data. Lack of proper user input validation combined with this vulnerability could amplify the risk.
Exploit Status
EPSS
0.05% (17% percentile)
CISA SSVC
The solution for CVE-2025-71281 is to update XenForo to version 2.3.7 or higher. This update corrects the method matching logic in templates, implementing a strict first-word match to prevent the invocation of unauthorized methods. It is strongly recommended to apply this update as soon as possible, especially for forums handling sensitive information or experiencing high traffic. Additionally, review custom templates to ensure they don't introduce new vulnerabilities. Monitoring the forum logs for suspicious activity can also help detect and respond to potential exploitation attempts. The update is the most effective preventative measure to mitigate this risk.
Update XenForo to version 2.3.7 or later. This version corrects method validation in templates, preventing the execution of unauthorized methods.
Vulnerability analysis and critical alerts directly to your inbox.
XenForo is a closed-source discussion forum software.
Updating to version 2.3.7 fixes the vulnerability and protects your forum from potential attacks.
Review your custom templates and monitor the forum logs for suspicious activity.
Currently, there are no specific tools, but updating is the best defense.
Look for unexpected changes to forum files, unusual activity in the logs, and any strange behavior on the forum.
CVSS Vector
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