The Activity Log for WordPress plugin suffers from a missing capability check in the winter_activity_log_action() function, which leads to unauthorized access to sensitive data stored in log files. Authenticated users with Subscriber-level privileges or above can exploit this flaw to read potentially sensitive information, including passwords of higher-level users like administrators. The vulnerability is tracked as CWE-862 (Missing Authorization) and has a CVSS 3.1 base score of 6.5, indicating a medium severity. The vulnerability affects all versions up to 1.2.8. No patch or official fix has been referenced in the available data.

An attacker with authenticated access at Subscriber level or higher can access sensitive information in the plugin's activity logs, including passwords of higher privileged users. This exposure compromises confidentiality but does not affect system integrity or availability. The vulnerability could lead to privilege escalation if the exposed credentials are reused or allow further attacks leveraging the leaked information.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Subscriber-level access to trusted users only and consider disabling or limiting the use of the Activity Log for WordPress plugin to prevent unauthorized data exposure.