CVE-2025-49347 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the Jupitercow WP sIFR WordPress plugin, specifically affecting versions up to and including 0.6.8.1. CSRF vulnerabilities allow attackers to trick authenticated users into submitting unwanted requests to a web application in which they are currently authenticated. In this case, the CSRF flaw can be exploited to inject Stored Cross-Site Scripting (XSS) payloads into the vulnerable WordPress site. Stored XSS occurs when malicious scripts are permanently stored on the target server, for example in a database, and executed in the context of users visiting the affected site. This combination of CSRF and Stored XSS significantly elevates the risk, as attackers can bypass normal authentication controls and implant persistent malicious scripts that affect all visitors or administrators. The vulnerability requires the victim to be logged into the WordPress site with sufficient privileges to trigger the vulnerable functionality. The absence of a CVSS score indicates that the vulnerability has not been fully assessed yet, but the technical details confirm the presence of a serious security flaw. No patches or official fixes have been published as of the date of disclosure, and no known exploits have been observed in the wild. The vulnerability impacts the confidentiality and integrity of data by enabling unauthorized actions and persistent script execution, which can lead to session hijacking, defacement, or further compromise of the site and its users.

For European organizations, this vulnerability poses a significant risk to WordPress-based websites, especially those using the WP sIFR plugin. The Stored XSS resulting from CSRF exploitation can lead to theft of user credentials, session tokens, and sensitive information, undermining user trust and potentially violating GDPR requirements for data protection. Attackers could leverage this vulnerability to escalate privileges, deface websites, or distribute malware to visitors. Public sector websites, e-commerce platforms, and media outlets relying on WordPress are particularly vulnerable, as compromise could disrupt services and damage reputations. The persistent nature of Stored XSS means that even after the initial attack, users remain at risk until the vulnerability is remediated. Additionally, the lack of patches increases the window of exposure. The impact extends beyond the affected site to its user base, potentially affecting customers and partners across Europe. This could lead to regulatory fines and legal consequences under European data protection laws if personal data is compromised.

European organizations should immediately audit their WordPress installations to identify the presence of the WP sIFR plugin and its version. If the plugin is installed and vulnerable (version <= 0.6.8.1), it should be disabled or removed until a security patch is released. Implementing strict Content Security Policies (CSP) can help mitigate the impact of Stored XSS by restricting the execution of unauthorized scripts. Web Application Firewalls (WAFs) should be configured to detect and block CSRF and XSS attack patterns targeting the plugin’s endpoints. Administrators should enforce multi-factor authentication (MFA) to reduce the risk of session hijacking. Regular monitoring of logs and user activity can help detect suspicious behavior indicative of exploitation attempts. Additionally, educating users about the risks of clicking on unknown links while authenticated can reduce the likelihood of successful CSRF attacks. Organizations should subscribe to vulnerability advisories from Jupitercow and Patchstack to apply patches promptly once available. Finally, conducting penetration testing focused on CSRF and XSS vulnerabilities can help identify residual risks.