CVE-2026-0910 is a deserialization vulnerability classified under CWE-502 affecting the wpForo Forum plugin for WordPress, up to and including version 2.4.13. The vulnerability arises from unsafe deserialization of untrusted input within the 'wpforo_display_array_data' function, allowing PHP Object Injection. This flaw enables authenticated users with at least Subscriber-level privileges to inject crafted PHP objects. However, the vulnerability alone does not guarantee exploitation because no gadget POP (Property Oriented Programming) chain exists within wpForo itself. Exploitation depends on the presence of a POP chain in other installed plugins or themes, which can be leveraged to execute arbitrary code, delete files, or access sensitive data. The attack vector is network-based (remote), requires low attack complexity, and no user interaction beyond authentication. The vulnerability impacts confidentiality, integrity, and availability severely, as reflected by the CVSS 3.1 score of 8.8. No public exploits have been reported yet, but the risk remains significant due to the common use of WordPress and wpForo in community forums. The vulnerability was published on February 11, 2026, and is assigned by Wordfence. No official patches are currently linked, indicating the need for cautious mitigation and monitoring.

For European organizations, especially those operating community forums or customer engagement platforms using WordPress with the wpForo plugin, this vulnerability poses a significant risk. If exploited, attackers could gain the ability to execute arbitrary PHP code, delete critical files, or exfiltrate sensitive data, potentially leading to data breaches, service disruptions, or complete site compromise. This is particularly concerning for organizations handling personal data under GDPR, where breaches can result in heavy fines and reputational damage. The requirement for authenticated access lowers the attack surface but does not eliminate risk, as Subscriber-level accounts are common and may be compromised via phishing or credential stuffing. The dependency on additional plugins or themes containing POP chains means that complex plugin ecosystems increase risk. European organizations with extensive WordPress customizations or third-party plugins/themes are at higher risk. The lack of known exploits in the wild currently provides a window for proactive defense, but the high CVSS score indicates that once exploited, the impact could be critical.

1. Immediately audit all installed plugins and themes for known POP chains or unsafe deserialization patterns, focusing on those commonly used with wpForo. 2. Restrict installation of untrusted or unnecessary plugins and themes to minimize the attack surface and reduce the chance of POP chain presence. 3. Enforce strict user role management and monitor for unusual Subscriber-level account activity to prevent credential abuse. 4. Implement Web Application Firewalls (WAFs) with custom rules to detect and block suspicious serialized payloads targeting the 'wpforo_display_array_data' function. 5. Regularly back up WordPress sites and test restoration procedures to mitigate potential destructive attacks. 6. Monitor security advisories from the wpForo vendor and WordPress community for patches or updates addressing this vulnerability and apply them promptly once available. 7. Consider deploying runtime application self-protection (RASP) or PHP hardening techniques to detect and prevent unsafe deserialization at runtime. 8. Educate administrators and developers about the risks of deserialization vulnerabilities and encourage secure coding practices in custom plugins or themes.