CVE-2025-64194 is a stored Cross-site Scripting (XSS) vulnerability affecting the ThimPress Eduma WordPress theme versions up to and including 5.7.6. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be injected and stored persistently within the website content. When other users visit the compromised pages, the injected scripts execute in their browsers with the privileges of the website, potentially enabling attackers to steal sensitive information such as authentication cookies, perform unauthorized actions on behalf of users, or redirect users to malicious sites. Stored XSS is particularly dangerous because the payload remains on the server and affects all visitors to the infected page. Although no known exploits are currently reported in the wild, the vulnerability is publicly disclosed and thus could be targeted by attackers. The Eduma theme is widely used in educational and e-learning websites, which often handle sensitive user data and require secure user authentication. The lack of a CVSS score means severity must be assessed based on impact and exploitability factors. The vulnerability does not require authentication to exploit, and user interaction is limited to visiting a maliciously crafted page. The scope includes all websites running affected Eduma versions, which could be substantial given the theme's popularity in the WordPress ecosystem. The vulnerability was published on October 29, 2025, and no patches or mitigations have been linked yet, emphasizing the need for immediate attention by site administrators.

For European organizations, particularly those in the education sector using the Eduma theme, this vulnerability poses a significant risk to confidentiality and integrity. Attackers could exploit the stored XSS to hijack user sessions, steal credentials, or manipulate content, potentially leading to unauthorized access to sensitive educational data or administrative functions. This could result in data breaches, reputational damage, and disruption of educational services. The availability impact is generally low for XSS but could be leveraged in combination with other attacks to cause denial of service or phishing campaigns. Given the widespread use of WordPress and Eduma in Europe, especially in countries with strong e-learning adoption, the threat could affect a large number of institutions. The vulnerability's ease of exploitation without authentication increases the risk of widespread abuse once exploit code becomes available. Additionally, regulatory frameworks such as GDPR impose strict requirements on protecting personal data, so exploitation could lead to compliance violations and financial penalties.

1. Monitor official ThimPress channels and Patchstack for the release of security patches addressing CVE-2025-64194 and apply them immediately upon availability. 2. Until patches are available, implement Web Application Firewall (WAF) rules to detect and block common XSS payloads targeting Eduma theme pages. 3. Employ strict input validation and output encoding on all user-supplied data fields within the Eduma theme, especially those that generate web page content. 4. Conduct thorough security audits and code reviews of customizations or plugins interacting with Eduma to identify and remediate unsafe input handling. 5. Educate site administrators and content editors about the risks of injecting untrusted content and enforce the principle of least privilege for user roles. 6. Use Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers visiting the site. 7. Regularly back up website data and maintain incident response plans to quickly recover from potential compromises. 8. Consider temporarily disabling or restricting features that allow user-generated content until the vulnerability is patched.