CVE-2026-25399: 
WordPress vulnerability analysis and mitigation

CVE-2026-25399 is a Missing Authorization vulnerability in the CryoutCreations Serious Slider WordPress plugin (cryout-serious-slider) that allows authenticated attackers to exploit incorrectly configured access control security levels. It affects all versions of the plugin through 1.2.7. The vulnerability was published on February 19, 2026, and carries a CVSS v3.1 base score of 4.3 (Medium) (Feedly).

The vulnerability is classified as CWE-862 (Missing Authorization), meaning the plugin fails to properly verify that a requesting user has the necessary permissions before executing certain actions. The attack vector is network-based, requires low privileges (an authenticated user account), and no user interaction, making it straightforward to exploit once an attacker has any level of WordPress authentication. The lack of proper authorization checks allows authenticated users to perform actions beyond their intended privilege level (Feedly).

Successful exploitation results in a limited availability impact (rated Low), with no confidentiality or integrity impact according to the CVSS scoring. An attacker with a low-privileged WordPress account could abuse the missing authorization checks to disrupt or manipulate slider-related functionality within the affected plugin, though the scope is unchanged and broader system compromise is not indicated (Feedly).

The vulnerability has a low EPSS score of approximately 0.017%, indicating a low probability of active exploitation in the near term. No public proof-of-concept exploit code, active in-the-wild exploitation, or threat actor attribution has been reported. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Exploitation requires at minimum a low-privileged authenticated account on the target WordPress installation (Feedly).

Users should update the Serious Slider plugin to a version beyond 1.2.7 if a patched release is available from CryoutCreations. If no patch is yet available, site administrators should consider deactivating the plugin until a fix is released, or restrict WordPress user registration to trusted individuals to reduce the risk of exploitation by low-privileged accounts. Monitoring WordPress admin logs for unexpected access to slider management functionality is also advisable (Feedly).