CVE-2025-58264 is a medium-severity stored Cross-Site Scripting (XSS) vulnerability identified in the artbees JupiterX Core plugin, a popular WordPress theme framework used for website building. The vulnerability arises from improper neutralization of input during web page generation, classified under CWE-79. Specifically, the JupiterX Core plugin versions up to 4.10.1 fail to adequately sanitize user-supplied input before rendering it on web pages, allowing attackers to inject malicious scripts that are persistently stored on the server. When a victim visits the compromised page, the malicious script executes in their browser context, potentially leading to session hijacking, credential theft, unauthorized actions on behalf of the user, or distribution of malware. The CVSS 3.1 base score is 6.5, reflecting a network attack vector with low attack complexity but requiring privileges and user interaction. The scope is changed, indicating that the vulnerability affects components beyond the initially vulnerable module, impacting confidentiality, integrity, and availability to a limited extent. No known exploits are currently reported in the wild, and no official patches have been linked yet. However, given the widespread use of JupiterX Core in WordPress sites, exploitation could be impactful if weaponized. The vulnerability requires an attacker to have at least some level of privileges (PR:L) and the victim to interact with the malicious content (UI:R).

For European organizations, this vulnerability poses a significant risk especially to businesses and entities relying on WordPress sites built with the JupiterX Core theme. Stored XSS can lead to data breaches involving user credentials, session tokens, or other sensitive information, undermining user trust and violating data protection regulations such as GDPR. Attackers could leverage this vulnerability to conduct phishing campaigns, spread malware, or escalate privileges within the affected web application. The compromise of web portals used for customer interaction, e-commerce, or internal communications could disrupt operations and cause reputational damage. Additionally, the cross-site scripting flaw could be chained with other vulnerabilities to facilitate more severe attacks. Given the medium CVSS score and the requirement for some privileges, the threat is moderate but should not be underestimated, especially in sectors with high regulatory scrutiny or handling sensitive personal data.

European organizations using JupiterX Core should immediately audit their WordPress installations to identify affected versions (up to 4.10.1). Although no official patch links are provided yet, organizations should monitor vendor advisories and Patchstack updates for timely patches. In the interim, implement strict input validation and output encoding on all user-supplied data, particularly in areas where users can submit content that is rendered on pages. Employ Web Application Firewalls (WAFs) with rules targeting common XSS payloads to block exploitation attempts. Restrict user privileges to the minimum necessary to reduce the risk of attackers injecting malicious content. Conduct regular security scans and penetration tests focusing on stored XSS vectors. Educate content managers and administrators about the risks of injecting untrusted content. Finally, ensure robust incident response plans are in place to quickly address any detected exploitation.