CVE-2025-11841 is a stored Cross-Site Scripting (XSS) vulnerability classified under CWE-79, found in the Greenshift – animation and page builder blocks plugin for WordPress. This vulnerability affects all versions up to and including 12.2.7. The root cause is insufficient sanitization of user input and inadequate escaping of output in the Chart Data attributes used by the plugin. Authenticated users with Contributor-level access or higher can exploit this flaw by injecting arbitrary JavaScript code into pages built with the plugin. When other users access these pages, the injected scripts execute in their browsers, potentially compromising session tokens, cookies, or enabling further attacks such as privilege escalation or defacement. The vulnerability does not require user interaction beyond viewing the affected page, and the attack vector is network-based with low attack complexity. The CVSS v3.1 base score is 6.4 (medium severity), reflecting limited confidentiality and integrity impact but no availability impact. No known public exploits exist yet, but the vulnerability poses a significant risk due to the widespread use of WordPress and the plugin in question. The vulnerability was published on November 4, 2025, and was assigned by Wordfence. No official patches or fixes are currently linked, emphasizing the need for immediate mitigation steps by administrators.

The impact of CVE-2025-11841 is primarily on the confidentiality and integrity of affected websites and their users. Successful exploitation allows attackers to execute arbitrary JavaScript in the context of the victim's browser, which can lead to theft of session cookies, user credentials, or other sensitive information. It can also enable attackers to perform actions on behalf of users, including privilege escalation or unauthorized content modification. For organizations, this can result in compromised user accounts, defacement of websites, loss of customer trust, and potential regulatory penalties if user data is exposed. Since the vulnerability requires authenticated access at the Contributor level or higher, insider threats or compromised accounts pose a significant risk. The lack of availability impact means the website remains operational, which can make detection harder. Given WordPress's dominant market share in content management systems and the plugin's usage in animation and page building, a large number of websites globally could be affected, increasing the potential attack surface.

To mitigate CVE-2025-11841, organizations should immediately audit user roles and restrict Contributor-level access to trusted users only, minimizing the risk of malicious script injection. Administrators should monitor and review content submitted via the Greenshift plugin, especially Chart Data attributes, for suspicious or unexpected scripts. Implementing Web Application Firewalls (WAFs) with rules to detect and block XSS payloads targeting this plugin can provide temporary protection. Until an official patch is released, consider disabling or removing the Greenshift plugin if feasible. Developers and site owners should apply strict input validation and output encoding on all user-supplied data within the plugin's context. Regularly update WordPress and all plugins to their latest versions once a patch addressing this vulnerability is available. Additionally, educating users about phishing and social engineering risks can reduce the likelihood of account compromise that enables exploitation.