CVE-2025-48349 is a medium-severity Stored Cross-Site Scripting (XSS) vulnerability identified in the origincode Video Gallery plugin, specifically the Vimeo and YouTube Gallery component, affecting versions up to 1.1.7. The vulnerability stems from improper neutralization of input during web page generation (CWE-79), allowing an attacker to inject malicious scripts that are stored and later executed in the context of users visiting the affected web pages. Exploitation requires at least low privileges (PR:L) and user interaction (UI:R), but no physical access or elevated privileges beyond that. The vulnerability has a CVSS v3.1 base score of 6.5, reflecting its medium severity. The attack vector is network-based (AV:N), with low attack complexity (AC:L), but the scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component. The impact affects confidentiality, integrity, and availability to a limited extent (C:L/I:L/A:L). No known exploits are currently reported in the wild, and no official patches have been linked yet. Stored XSS vulnerabilities can be leveraged to hijack user sessions, deface websites, or deliver malware, especially in environments where the plugin is used to display video content dynamically from Vimeo and YouTube. Since the plugin is typically used in content management systems (CMS) or websites that embed video galleries, the vulnerability can affect website visitors and administrators alike if exploited.

For European organizations, the impact of this vulnerability can be significant, particularly for those relying on the origincode Video Gallery plugin to manage and display video content on their websites. Exploitation could lead to session hijacking, unauthorized actions performed on behalf of users, theft of sensitive information, or distribution of malicious payloads to visitors. This can damage organizational reputation, lead to regulatory non-compliance (e.g., GDPR breaches if personal data is compromised), and cause operational disruptions. Organizations in sectors such as media, education, e-commerce, and public services that use video galleries extensively are at higher risk. Additionally, the scope change in the vulnerability means that the attack could affect other components or users beyond the initial plugin context, increasing the potential damage. Although no exploits are known in the wild yet, the presence of stored XSS vulnerabilities is often attractive to attackers due to their persistence and impact. European organizations must therefore consider this vulnerability a credible threat vector, especially given the widespread use of CMS platforms integrating such plugins.

1. Immediate mitigation should include disabling or removing the affected origincode Video Gallery – Vimeo and YouTube Gallery plugin until a patch is available. 2. Monitor vendor communications and security advisories for official patches or updates addressing CVE-2025-48349 and apply them promptly. 3. Implement Web Application Firewall (WAF) rules to detect and block malicious input patterns that could exploit stored XSS in the plugin. 4. Conduct thorough input validation and output encoding on all user-supplied data related to video gallery content, ensuring that any embedded scripts or HTML are sanitized before storage and rendering. 5. Review and restrict user privileges to minimize the risk of low-privileged users injecting malicious content. 6. Educate website administrators and content editors about the risks of injecting untrusted content and encourage best practices for content management. 7. Perform regular security testing, including automated scanning and manual penetration testing focused on XSS vulnerabilities in web applications using this plugin. 8. Consider implementing Content Security Policy (CSP) headers to reduce the impact of potential XSS attacks by restricting the sources from which scripts can be loaded.