CVE-2025-10496 identifies a stored Cross-Site Scripting (XSS) vulnerability in the Cookie Notice & Consent plugin for WordPress, developed by christophrado. This vulnerability affects all versions up to and including 1.6.5. The root cause is insufficient input sanitization and output escaping of the 'uuid' parameter, which is used by the plugin to manage cookie consent functionality. An attacker can exploit this flaw by injecting arbitrary JavaScript code into the 'uuid' parameter, which is then stored persistently and rendered on web pages viewed by other users. Since the vulnerability is stored XSS, the malicious script executes automatically when a user accesses the infected page, without requiring any user interaction or authentication. The vulnerability impacts confidentiality and integrity by enabling attackers to steal cookies, hijack sessions, perform actions on behalf of users, or deface the website. The CVSS v3.1 score of 7.2 reflects a network attack vector with low attack complexity, no privileges or user interaction required, and a scope change due to affecting other users. No patches or fixes are currently linked, and no known exploits have been reported in the wild as of publication. The vulnerability was reserved in mid-September 2025 and published in early October 2025, indicating recent disclosure. The CWE classification is CWE-80, which covers improper neutralization of script-related HTML tags leading to XSS.

The impact of CVE-2025-10496 is significant for organizations using the affected WordPress plugin. Exploitation can lead to theft of sensitive user data such as session cookies, enabling account takeover or unauthorized actions within the context of the victim’s session. This can result in data breaches, unauthorized transactions, or defacement of websites, damaging organizational reputation and user trust. Since the vulnerability is exploitable remotely without authentication or user interaction, it increases the attack surface considerably. E-commerce sites, membership portals, and any web services relying on the plugin for cookie consent are particularly at risk. The scope of impact extends to all users visiting compromised pages, potentially affecting large user bases. While availability is not directly impacted, the confidentiality and integrity losses can have cascading effects on business operations and compliance with data protection regulations such as GDPR. The lack of known exploits in the wild currently reduces immediate risk but does not diminish the urgency for remediation, as public disclosure often leads to rapid development of exploit code.

To mitigate CVE-2025-10496, organizations should immediately check for updates or patches from the plugin vendor and apply them as soon as they become available. In the absence of an official patch, temporary mitigations include disabling the Cookie Notice & Consent plugin or replacing it with an alternative plugin that is not vulnerable. Web application firewalls (WAFs) can be configured to detect and block malicious payloads targeting the 'uuid' parameter, using custom rules or signatures for XSS attacks. Implementing Content Security Policy (CSP) headers can help reduce the impact of injected scripts by restricting script execution sources. Site administrators should audit their WordPress installations for signs of compromise, including unexpected script injections or altered pages. Regular backups and monitoring of web content integrity are recommended to enable rapid recovery. Additionally, educating developers and administrators on secure coding practices, especially proper input validation and output encoding, will help prevent similar vulnerabilities in the future.