CVE-2025-7839 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the WordPress plugin 'Restore Permanently delete Post or Page Data' developed by pokornydavid. The vulnerability exists in all versions up to and including 1.0 due to the absence or improper implementation of nonce validation in the rp_dpo_dpa_ajax_dp_delete_data() function. Nonces in WordPress are security tokens used to verify that requests are intentional and originate from legitimate users. Without proper nonce checks, attackers can craft malicious requests that, when executed by an authenticated administrator (via clicking a link or visiting a crafted webpage), cause permanent deletion of post or page data. This attack vector requires no authentication by the attacker but depends on social engineering to induce administrator interaction. The vulnerability affects data integrity by enabling unauthorized deletion of content but does not compromise confidentiality or availability. The CVSS 3.1 score is 4.3 (medium), reflecting the need for user interaction and the limited scope of impact. No patches or exploit code are currently publicly available, and no active exploitation has been reported. The vulnerability highlights the critical importance of nonce validation in WordPress AJAX handlers to prevent CSRF attacks.

The primary impact of this vulnerability is unauthorized deletion of WordPress post or page data, which compromises data integrity. For organizations relying on the affected plugin, this could result in loss of critical content, disruption of website operations, and potential reputational damage. Since the attack requires an administrator to interact with a malicious link, the risk is somewhat mitigated by user awareness but remains significant in environments with less security training or high phishing exposure. The vulnerability does not affect confidentiality or availability directly but could indirectly cause operational disruptions if important content is lost. Organizations with high content turnover or regulatory requirements for data integrity may face compliance issues. The absence of known exploits reduces immediate risk, but the vulnerability remains a potential vector for targeted attacks, especially in sectors where WordPress is widely used, such as media, education, and small to medium enterprises.

To mitigate this vulnerability, organizations should immediately verify that nonce validation is properly implemented in the rp_dpo_dpa_ajax_dp_delete_data() function or equivalent AJAX handlers within the plugin. If no patch is available, administrators should consider disabling or uninstalling the plugin until a secure update is released. Additionally, implement the following measures: 1) Educate administrators on phishing and social engineering risks to reduce the likelihood of clicking malicious links. 2) Employ web application firewalls (WAFs) with rules to detect and block suspicious CSRF attempts targeting AJAX endpoints. 3) Restrict administrative access to trusted networks or VPNs to limit exposure. 4) Regularly back up WordPress content to enable recovery from unauthorized deletions. 5) Monitor logs for unusual deletion requests or patterns indicative of CSRF exploitation. 6) Encourage plugin developers to adopt secure coding practices including nonce verification and capability checks for all state-changing operations.