The Check & Log Email WordPress plugin prior to version 2.0.13 contains a stored XSS vulnerability (CWE-79) due to improper handling of email replacement when the email encoder setting is enabled. This flaw allows unauthenticated attackers to inject malicious scripts that are stored and executed in the context of users viewing the affected content. The vulnerability has a CVSS 3.1 base score of 5.4, indicating a medium severity with network attack vector, low attack complexity, requiring low privileges and user interaction, and impacts on confidentiality and integrity but not availability. No official patch or remediation level has been published by the vendor as of the data provided.

Successful exploitation of this vulnerability could allow an unauthenticated attacker to perform stored XSS attacks, potentially leading to limited disclosure or modification of information within the affected WordPress site. The impact does not include denial of service or full system compromise based on the CVSS vector and description. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling the email encoder setting if feasible or apply other temporary mitigations recommended by the vendor. Monitor official Check & Log Email plugin channels for updates and apply version 2.0.13 or later once released to address this vulnerability.