CVE-2025-5585 is a Stored Cross-Site Scripting (XSS) vulnerability identified in the SiteOrigin Widgets Bundle plugin for WordPress, maintained by the vendor gpriday. This vulnerability affects all versions up to and including 1.68.4. The root cause lies in improper input sanitization and output escaping of the `data-url` DOM element attribute. Specifically, authenticated users with Contributor-level access or higher can inject arbitrary JavaScript code into pages via this attribute. When other users visit the compromised pages, the injected scripts execute in their browsers within the context of the vulnerable site. This vulnerability is classified under CWE-79, indicating improper neutralization of input during web page generation. The CVSS v3.1 base score is 6.4 (medium severity), with the vector AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N, meaning the attack can be launched remotely over the network with low attack complexity, requires privileges equivalent to Contributor, does not require user interaction, and impacts confidentiality and integrity with a scope change. No known exploits are currently reported in the wild, and no official patches have been linked yet. The vulnerability allows an attacker to compromise user sessions, steal sensitive information, or perform actions on behalf of other users, leveraging the trust of the affected website. Since the vulnerability requires authenticated access at Contributor level or above, it is not exploitable by anonymous users but remains a significant risk in environments with multiple user roles or weak access controls.

For European organizations using WordPress sites with the SiteOrigin Widgets Bundle plugin, this vulnerability poses a moderate risk. Exploitation could lead to unauthorized disclosure of sensitive information such as session cookies or personal data, violating GDPR requirements on data protection and privacy. Integrity of website content could be compromised, potentially damaging brand reputation and user trust. Since the vulnerability allows scope change, attackers could escalate the impact beyond the initially compromised user, affecting administrators or other privileged users. This is particularly concerning for organizations in sectors like finance, healthcare, government, and e-commerce, where website integrity and confidentiality are critical. Additionally, the ability to inject scripts without user interaction increases the risk of automated or stealthy attacks. The absence of known exploits in the wild reduces immediate urgency but does not eliminate risk, as attackers may develop exploits once the vulnerability becomes public knowledge. The medium CVSS score reflects a balance between the required privileges and the potential impact on confidentiality and integrity.

Immediately audit WordPress sites to identify installations of the SiteOrigin Widgets Bundle plugin, especially versions up to 1.68.4. Restrict Contributor-level and higher access strictly to trusted users; review user roles and permissions to minimize the number of users who can exploit this vulnerability. Implement Web Application Firewall (WAF) rules to detect and block suspicious payloads targeting the `data-url` attribute or typical XSS patterns within the plugin's context. Monitor website logs and user activity for unusual behavior indicative of XSS exploitation attempts, such as unexpected script injections or anomalous page modifications. Apply strict Content Security Policy (CSP) headers to limit the execution of inline scripts and restrict sources of executable scripts, mitigating the impact of injected scripts. Stay alert for official patches or updates from the SiteOrigin Widgets Bundle maintainers and apply them promptly once available. Consider temporarily disabling or replacing the plugin with alternative, secure widget bundles if immediate patching is not feasible. Educate site administrators and content contributors about the risks of injecting untrusted content and the importance of secure input handling.