CVE-2025-8149 identifies a stored cross-site scripting vulnerability in the aThemes Addons for Elementor plugin for WordPress, affecting all versions up to 1.1.2. The vulnerability exists in the Countdown widget due to improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of user-supplied attributes. Authenticated attackers with contributor-level permissions or higher can inject arbitrary JavaScript code into pages via this widget. Because the malicious script is stored persistently, it executes every time a user accesses the infected page, potentially compromising user sessions, stealing credentials, or performing unauthorized actions within the context of the victim's browser session. The vulnerability does not require user interaction beyond page access and has a CVSS 3.1 base score of 6.4, reflecting a medium severity with low attack complexity but requiring privileges. The scope is changed (S:C) because the vulnerability affects resources beyond the attacker’s privileges. No public exploits are currently known, but the presence of this vulnerability in a popular WordPress plugin used globally makes it a significant risk. The root cause is a failure to properly sanitize and escape input fields in the Countdown widget, a common vector for stored XSS in web applications. The vulnerability was reserved in July 2025 and published in September 2025, with no official patch links available at this time.

The impact of CVE-2025-8149 is primarily on the confidentiality and integrity of affected WordPress sites and their users. Successful exploitation allows attackers to execute arbitrary JavaScript in the context of the victim’s browser, which can lead to session hijacking, theft of authentication cookies, defacement of website content, or redirection to malicious sites. Since the vulnerability requires contributor-level access, attackers must first compromise or have legitimate access to an account with editing privileges, which is common in multi-user WordPress environments. The scope change means that the attacker can affect users with higher privileges or site visitors, expanding the potential damage. For organizations, this could result in data breaches, loss of user trust, reputational damage, and potential regulatory consequences if user data is compromised. The lack of a patch increases the risk window, especially for sites that do not restrict contributor access or monitor content changes closely. Although no known exploits are reported, the medium severity and ease of exploitation by authenticated users make it a credible threat to many WordPress-based websites worldwide.

To mitigate CVE-2025-8149, organizations should immediately restrict contributor-level access to trusted users only and audit existing contributor accounts for suspicious activity. Implement strict content review and approval workflows to detect and prevent malicious script injections. Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious payloads targeting the Countdown widget. Disable or remove the aThemes Addons for Elementor plugin if it is not essential, or replace it with alternative plugins that have no known vulnerabilities. Monitor website content and logs for unusual changes or script injections. Until an official patch is released, consider applying manual input sanitization or output escaping in the plugin code if feasible, or use security plugins that can sanitize user inputs. Educate site administrators and contributors about the risks of XSS and safe content practices. Regularly back up website data to enable quick restoration in case of compromise. Finally, stay updated on vendor announcements for patches or security advisories.