CVE-2026-25422 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the Popularis Extra theme developed by Themes4WP, affecting versions up to and including 1.2.10. CSRF vulnerabilities occur when a web application does not adequately verify that requests to perform state-changing actions originate from legitimate users. In this case, the Popularis Extra theme lacks sufficient anti-CSRF protections, such as nonce tokens or referer validation, allowing attackers to craft malicious web pages that, when visited by authenticated users, cause unintended actions on the victim site. These actions could include modifying theme settings, changing configurations, or other administrative operations permitted by the theme's interface. The vulnerability requires the victim to be logged into the WordPress site with sufficient privileges, but no additional user interaction beyond visiting a malicious link is necessary. No CVSS score has been assigned yet, and no public exploits are known, but the vulnerability is publicly disclosed and should be considered exploitable. The absence of patch links suggests that a fix may not yet be available, increasing the urgency for mitigation. This vulnerability is particularly relevant for websites using the Popularis Extra theme, which is a WordPress theme often used by small to medium-sized businesses and organizations for their web presence.

For European organizations, this CSRF vulnerability can lead to unauthorized changes in website appearance, configuration, or functionality, potentially damaging brand reputation and user trust. Attackers could manipulate theme settings to inject malicious content, redirect users, or degrade site availability. Since WordPress powers a significant portion of European websites, and Themes4WP products have a user base in Europe, the risk is material. Compromised websites may also serve as vectors for further attacks, including phishing or malware distribution. The integrity of the affected systems is primarily at risk, with potential secondary impacts on availability and confidentiality if attackers leverage the vulnerability to escalate privileges or implant backdoors. Organizations in sectors with high web presence requirements, such as e-commerce, media, and government, could face operational disruptions or compliance issues if exploited.

Organizations should immediately audit their WordPress installations to identify the use of the Popularis Extra theme, especially versions up to 1.2.10. Until an official patch is released, administrators should implement manual CSRF mitigations such as adding nonce verification to theme forms and actions, enforcing strict referer header checks, and limiting administrative access to trusted networks or VPNs. Web Application Firewalls (WAFs) can be configured to detect and block suspicious cross-site requests targeting theme endpoints. Regularly monitoring website logs for unusual POST requests or changes in theme settings can help detect exploitation attempts early. Additionally, educating users about the risks of visiting untrusted sites while logged into administrative accounts can reduce exposure. Once a patch is available, prompt updating of the theme is critical. Backup procedures should be reviewed to ensure rapid recovery in case of compromise.