The vulnerability identified as CVE-2025-12156 affects the Ai Auto Tool Content Writing Assistant (Gemini Writer, ChatGPT) All in One plugin for WordPress, specifically versions 2.0.7 through 2.2.6. The root cause is a missing authorization check (CWE-862) in the save_post_data() function, which is responsible for handling post data saving operations. This flaw allows any authenticated user with at least Subscriber-level privileges to bypass intended access controls and create or publish arbitrary posts on the affected WordPress site. Since WordPress typically restricts post creation and publishing to users with Editor or Author roles, this vulnerability effectively elevates the capabilities of low-privilege users. The vulnerability does not require user interaction and can be exploited remotely over the network, as it involves authenticated access to the WordPress backend. The impact is primarily on data integrity, as unauthorized posts can be injected, potentially leading to misinformation, defacement, or unauthorized content distribution. Confidentiality and availability remain unaffected. No public exploits have been reported yet, but the vulnerability's presence in a popular content management system plugin makes it a candidate for future exploitation. The CVSS v3.1 base score is 4.3 (medium), reflecting the ease of exploitation with low privileges but limited impact scope. The vulnerability was published on November 4, 2025, and no official patches have been linked yet, indicating the need for immediate attention from site administrators.

For European organizations, this vulnerability poses a risk primarily to the integrity of web content hosted on WordPress sites using the affected plugin. Attackers with minimal privileges can inject unauthorized posts, which could be used to spread misinformation, phishing content, or malicious links, potentially damaging brand reputation and user trust. Organizations relying on WordPress for corporate blogs, news updates, or customer communications are particularly vulnerable. While the vulnerability does not directly compromise sensitive data confidentiality or site availability, the unauthorized content publishing could lead to secondary attacks such as social engineering or malware distribution. Regulatory implications may arise if manipulated content violates compliance requirements, especially under GDPR if personal data is involved in the posts. The risk is heightened for organizations with multiple users having Subscriber or higher roles without strict role management. The lack of known exploits reduces immediate threat but does not eliminate the risk of future attacks.

1. Monitor the vendor's official channels for a security patch and apply it immediately upon release. 2. Until a patch is available, restrict WordPress user roles to minimize the number of users with Subscriber or higher privileges, especially on sites using this plugin. 3. Implement custom authorization checks or use security plugins that enforce strict capability checks on post creation and publishing functions. 4. Regularly audit user accounts and remove or downgrade unnecessary accounts with elevated privileges. 5. Employ web application firewalls (WAF) with rules to detect and block suspicious post creation activities from low-privilege users. 6. Enable logging and alerting on post creation events to detect unauthorized content publishing quickly. 7. Educate site administrators and content managers about the vulnerability and encourage vigilance for unusual content appearing on their sites. 8. Consider temporarily disabling or uninstalling the affected plugin if feasible until a secure version is available.