The Sync Feedly plugin for WordPress, developed by cristianr909090, suffers from a Cross-Site Request Forgery (CSRF) vulnerability identified as CVE-2025-9894. This vulnerability exists in all versions up to and including 1.0.1 due to missing or incorrect nonce validation in the crsf_cron_job_func function, which is responsible for synchronizing content from Feedly. Nonces are security tokens used to verify that requests originate from legitimate users; their absence or improper implementation allows attackers to craft malicious requests that appear legitimate to the server. An unauthenticated attacker can exploit this flaw by tricking a site administrator into clicking a specially crafted link or visiting a malicious webpage, which then triggers the synchronization process without the administrator's explicit consent. This can result in unauthorized creation of multiple posts on the WordPress site, compromising content integrity. The vulnerability does not expose sensitive data (no confidentiality impact) nor does it disrupt site availability. The CVSS v3.1 base score is 4.3, reflecting low complexity of attack but requiring user interaction and no privileges. No patches or fixes are currently linked, and no active exploits have been reported. The vulnerability is categorized under CWE-352, a common web application security weakness related to CSRF attacks.

The primary impact of CVE-2025-9894 is on the integrity of WordPress sites using the Sync Feedly plugin. Attackers can inject unauthorized content by forcing synchronization actions, potentially leading to spam posts, misinformation, or defacement. This can damage the reputation of affected websites and erode user trust. Although the vulnerability does not compromise confidentiality or availability, the unauthorized content creation can increase administrative overhead and require manual cleanup. For organizations relying on Feedly synchronization for content management, this may disrupt workflows and introduce risks of content pollution. Since exploitation requires tricking an administrator, the risk is somewhat mitigated by user awareness but remains significant for sites with multiple administrators or less security-conscious users. No known widespread exploitation reduces immediate threat but does not eliminate future risk. The vulnerability could be leveraged as part of a broader attack chain, for example, to insert malicious links or phishing content.

To mitigate CVE-2025-9894, organizations should first verify if they use the Sync Feedly plugin and identify the version in use. Since no official patch is currently linked, administrators should consider the following specific actions: 1) Disable or uninstall the Sync Feedly plugin until a secure update is released. 2) Implement Web Application Firewall (WAF) rules to detect and block suspicious requests targeting the crsf_cron_job_func endpoint or related synchronization actions. 3) Educate site administrators about the risks of clicking untrusted links, especially when logged into WordPress admin accounts. 4) Employ security plugins that enforce nonce validation or add additional CSRF protections as a temporary measure. 5) Monitor site content for unexpected posts or synchronization activity to detect exploitation attempts early. 6) Once a patch is available, apply it promptly and verify nonce validation is correctly implemented. 7) Review and limit administrator privileges to reduce the attack surface. These targeted mitigations go beyond generic advice by focusing on the specific plugin function and attack vector.