CVE-2025-9979 identifies a missing authorization vulnerability (CWE-862) in the Maspik – Ultimate Spam Protection plugin for WordPress, specifically affecting versions 2.5.6 and prior. The vulnerability stems from the absence of capability checks in the Maspik_spamlog_download_csv function, which handles exporting the spam log database as a CSV file. This flaw allows any authenticated user with subscriber-level privileges or higher to invoke this function and download the spam logs without proper authorization. The spam logs may contain blocked submission attempts, including legitimate user inputs misclassified as spam, which can include sensitive personal or business data. The vulnerability is remotely exploitable over the network (AV:N) with low attack complexity (AC:L), requiring only authenticated access (PR:L) but no user interaction (UI:N). The scope is unchanged (S:U), and the impact is limited to confidentiality (C:L) without affecting integrity or availability. The CVSS v3.1 base score is 4.3, reflecting a medium severity rating. There are no known exploits in the wild at the time of publication, and no official patches have been linked yet. This vulnerability poses a privacy risk by exposing sensitive data to unauthorized users within the WordPress environment, potentially leading to information disclosure and compliance issues. The plugin is widely used in WordPress sites for spam protection, making this vulnerability relevant for many organizations relying on this plugin for content filtering.

The primary impact of CVE-2025-9979 is unauthorized disclosure of sensitive information contained within the spam log database of the Maspik plugin. Organizations using this plugin may inadvertently expose user-submitted data that was blocked or flagged as spam, including potentially sensitive or personal information. This can lead to privacy violations, regulatory non-compliance (e.g., GDPR, CCPA), and reputational damage if sensitive data is leaked or misused. Since the vulnerability requires only subscriber-level authentication, it lowers the barrier for exploitation by internal users or compromised accounts. Although the vulnerability does not affect system integrity or availability, the confidentiality breach can facilitate further social engineering or targeted attacks. The risk is especially significant for organizations handling sensitive customer data or operating in regulated industries. Additionally, the exposure of spam logs may reveal insights into filtering rules and blocked content, which could be leveraged by attackers to evade detection in future campaigns.

To mitigate CVE-2025-9979, organizations should first verify if they are using the Maspik – Ultimate Spam Protection plugin version 2.5.6 or earlier. Immediate steps include restricting subscriber-level user permissions and auditing existing user accounts to ensure minimal privilege principles are enforced. Administrators should monitor access logs for unusual download activity related to spam logs. Since no official patch is currently linked, organizations can implement temporary workarounds such as disabling the spam log export functionality or applying custom code to enforce capability checks on the Maspik_spamlog_download_csv function. Regularly updating the plugin once a patch is released is critical. Additionally, organizations should review and sanitize spam log contents to minimize sensitive data storage and consider encrypting logs at rest. Employing web application firewalls (WAF) to detect and block unauthorized access attempts to the export function can provide an additional layer of defense. Finally, educating users about the risks of privilege misuse and enforcing strong authentication mechanisms can reduce exploitation likelihood.