CVE-2025-47702 is a Cross-Site Scripting (XSS) vulnerability classified under CWE-79 that affects the Drupal oEmbed Providers module, specifically versions prior to 2.2.2. The vulnerability arises from improper neutralization of input during web page generation, allowing malicious actors to inject and execute arbitrary scripts in the context of the affected web application. The oEmbed Providers module in Drupal is responsible for embedding content from external sources, and improper sanitization of input in this process can lead to XSS attacks. The CVSS 3.1 base score is 6.1 (medium severity), with an attack vector of network (remote exploitation), low attack complexity, no privileges required, but requiring user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability can affect components beyond the vulnerable module, and the impact is limited to confidentiality and integrity (both low), with no impact on availability. No known exploits are currently reported in the wild, and no official patches are linked yet, but the vulnerability is publicly disclosed as of May 14, 2025. This vulnerability could be leveraged by attackers to execute malicious scripts in the browsers of users visiting a compromised or maliciously crafted Drupal site using the vulnerable oEmbed Providers module, potentially leading to session hijacking, data theft, or defacement.

For European organizations, the impact of this vulnerability can be significant, especially for those relying on Drupal-based websites that utilize the oEmbed Providers module for embedding external content. Exploitation could allow attackers to steal session cookies, perform actions on behalf of authenticated users, or manipulate displayed content, undermining user trust and potentially exposing sensitive data. Given the widespread use of Drupal in government, education, and enterprise sectors across Europe, successful exploitation could lead to reputational damage, regulatory non-compliance (e.g., GDPR breaches due to data exposure), and financial losses. The requirement for user interaction means phishing or social engineering could be used to lure users into triggering the XSS payload. The changed scope indicates that the vulnerability may affect other components or modules, increasing the risk of broader compromise within the Drupal ecosystem. Although no active exploits are known, the public disclosure increases the risk of future exploitation, necessitating proactive mitigation.

European organizations should prioritize upgrading the Drupal oEmbed Providers module to version 2.2.2 or later as soon as it becomes available to address this vulnerability. Until a patch is applied, organizations should implement strict Content Security Policy (CSP) headers to restrict script execution and mitigate the impact of potential XSS payloads. Additionally, input validation and output encoding should be reviewed and enhanced in custom Drupal modules or themes that interact with oEmbed content. Web Application Firewalls (WAFs) can be configured to detect and block suspicious payloads targeting the vulnerable endpoints. Security teams should also conduct thorough audits of Drupal installations to identify the presence of the vulnerable module and monitor logs for unusual activity. User awareness training to recognize phishing attempts that could trigger XSS attacks is recommended. Finally, organizations should subscribe to Drupal security advisories and maintain an incident response plan tailored to web application attacks.