CVE-2025-49347 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the Jupitercow WP sIFR WordPress plugin, specifically affecting versions up to and including 0.6.8.1. The vulnerability enables attackers to trick authenticated users into executing unwanted actions on vulnerable websites by exploiting the lack of proper CSRF protections. This can lead to stored Cross-Site Scripting (XSS), where malicious scripts are permanently injected into the website's content, affecting all visitors and users interacting with the compromised pages. The CVSS 3.1 base score of 7.1 reflects the vulnerability's network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The scope is changed (S:C), indicating that the vulnerability affects resources beyond the initially vulnerable component, and it impacts confidentiality, integrity, and availability to a low degree (C:L/I:L/A:L). Although no known exploits have been reported in the wild, the potential for stored XSS makes this vulnerability particularly dangerous, as it can be used for persistent attacks such as session hijacking, data theft, or defacement. The vulnerability was reserved in June 2025 and published in December 2025, with no patches currently linked, suggesting that mitigation efforts are urgent. The plugin is used in WordPress environments, which are widely deployed across many European organizations, especially those relying on content management systems for their web presence.

For European organizations, the impact of CVE-2025-49347 can be significant, particularly for those relying on the Jupitercow WP sIFR plugin within their WordPress infrastructure. The vulnerability can lead to unauthorized actions performed on behalf of users, potentially compromising user data confidentiality through stored XSS attacks. This can result in session hijacking, credential theft, or the injection of malicious content that damages organizational reputation. The integrity of website content may be compromised, leading to misinformation or defacement. Availability could also be affected if attackers exploit the vulnerability to disrupt services or inject scripts that degrade performance. Organizations in sectors such as e-commerce, government, and media, which often use WordPress extensively, may face regulatory scrutiny under GDPR if personal data is exposed or manipulated. The lack of authentication requirements lowers the barrier for attackers, increasing the risk of widespread exploitation if the vulnerability is not addressed promptly.

To mitigate CVE-2025-49347, European organizations should first verify if they use the Jupitercow WP sIFR plugin and identify the affected versions (up to 0.6.8.1). Immediate steps include: 1) Applying any available patches or updates from the vendor once released; 2) If patches are not yet available, temporarily disabling or removing the plugin to eliminate exposure; 3) Implementing Web Application Firewall (WAF) rules to detect and block CSRF attempts and suspicious payloads indicative of stored XSS; 4) Enforcing strict Content Security Policy (CSP) headers to limit the impact of injected scripts; 5) Conducting thorough security audits and code reviews of custom integrations involving the plugin; 6) Educating users about phishing and social engineering tactics that could facilitate CSRF exploitation; 7) Monitoring logs and user activity for unusual behavior that may indicate exploitation attempts; 8) Ensuring that all WordPress installations and plugins follow best security practices, including the use of nonce tokens to prevent CSRF. These targeted actions go beyond generic advice and address the specific nature of this vulnerability.