CVE-2025-12631 is a stored cross-site scripting (XSS) vulnerability identified in the Squirrels Auto Inventory plugin for WordPress, affecting all versions up to and including 1.0.3. The root cause is insufficient input sanitization and output escaping in the plugin's admin settings interface, allowing authenticated users with administrator-level permissions or higher to inject arbitrary JavaScript code into pages. This vulnerability specifically impacts multi-site WordPress installations where the unfiltered_html capability is disabled, which restricts the ability to post unfiltered HTML content. When a user visits a page containing the injected script, the malicious code executes in their browser context, potentially leading to session hijacking, privilege escalation, or unauthorized actions performed on behalf of the user. The vulnerability requires high privileges (administrator or above) to exploit, and no user interaction is necessary beyond visiting the compromised page. The CVSS 3.1 base score is 4.4 (medium severity), reflecting network attack vector, high attack complexity, high privileges required, no user interaction, and limited confidentiality and integrity impact without availability impact. No public exploits have been reported yet, and no patches are currently linked, indicating that mitigation may rely on plugin updates or configuration changes. The vulnerability is tracked under CWE-79, which covers improper neutralization of input during web page generation leading to XSS attacks.

The primary impact of CVE-2025-12631 is the potential for attackers with administrator privileges to inject persistent malicious scripts into WordPress sites using the Squirrels Auto Inventory plugin in multi-site environments. This can lead to session hijacking, theft of sensitive user information, unauthorized actions performed by users unknowingly, and potential compromise of site integrity. Although exploitation requires high privileges, the stored nature of the XSS means any user accessing the infected pages could be affected, expanding the scope of impact within an organization. This can undermine trust in the affected websites, cause data breaches, and facilitate further attacks such as privilege escalation or lateral movement within the network. Since multi-site WordPress installations are often used by enterprises, educational institutions, and large organizations, the impact can be significant in these contexts. The medium CVSS score reflects the limited scope due to required privileges and lack of user interaction, but the confidentiality and integrity risks remain notable. Organizations relying on this plugin in multi-site setups face risks of internal compromise and reputational damage if the vulnerability is exploited.

To mitigate CVE-2025-12631, organizations should first verify if they are running multi-site WordPress installations with the Squirrels Auto Inventory plugin version 1.0.3 or earlier. Immediate steps include restricting administrator access to trusted personnel only and reviewing admin settings for any suspicious or unauthorized script injections. Since no patch is currently linked, consider disabling or removing the plugin until a secure update is released. If disabling is not feasible, implement a Web Application Firewall (WAF) with custom rules to detect and block malicious script payloads in admin inputs and page content. Additionally, enable Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts on affected pages. Regularly audit user permissions to ensure only necessary users have administrator-level access. Monitor logs for unusual activity related to admin settings changes or page content modifications. Finally, stay updated with vendor announcements for patches or security advisories and apply updates promptly once available.