CVE-2024-7622 is a vulnerability classified under CWE-862 (Missing Authorization) found in the Revision Manager TMC plugin for WordPress, specifically in the _a_ajaxQuickEmailTestCallback() function. This function lacks proper capability checks, allowing any authenticated user with subscriber-level permissions or above to send arbitrary emails through the web server hosting the plugin. The vulnerability affects all versions up to and including 2.8.19. Exploitation requires authentication but no additional user interaction, and it can be performed remotely over the network. The flaw enables attackers to abuse the email sending functionality to deliver arbitrary content to any recipient, potentially facilitating phishing, spam, or social engineering attacks. Although the vulnerability does not directly compromise confidentiality or availability, it undermines the integrity of email communications originating from the affected server. No patches or official fixes are currently linked, and no known exploits have been observed in the wild. The CVSS v3.1 base score is 4.3, indicating medium severity, with attack vector as network, low attack complexity, privileges required at the low level, no user interaction, and unchanged scope.

The primary impact of CVE-2024-7622 is the unauthorized use of the affected WordPress server to send arbitrary emails. This can lead to reputational damage if the server is used to send phishing or spam emails, potentially causing recipients to distrust legitimate communications from the domain. Organizations may face increased risk of social engineering attacks targeting their users or partners. Although the vulnerability does not directly expose sensitive data or disrupt service availability, the ability to send arbitrary emails can be leveraged as a stepping stone for further attacks, such as credential harvesting or malware distribution. The impact is particularly significant for organizations relying on the Revision Manager TMC plugin for critical communications or those with large subscriber bases. Additionally, abuse of the email system can lead to blacklisting of the server IP, affecting legitimate email deliverability. The medium severity reflects these risks balanced against the requirement for authenticated access and the limited scope of affected functionality.

To mitigate CVE-2024-7622, organizations should first verify if they are using the Revision Manager TMC plugin version 2.8.19 or earlier. If so, immediate steps include restricting subscriber-level user permissions to trusted individuals only, as the vulnerability requires at least subscriber-level authentication. Administrators should monitor outgoing email logs for unusual or unauthorized email activity to detect potential exploitation. Implementing web application firewalls (WAFs) with rules to detect and block suspicious AJAX requests targeting the _a_ajaxQuickEmailTestCallback() function can provide temporary protection. Since no official patch is currently available, consider disabling or removing the vulnerable plugin if email sending functionality is not critical. Additionally, educating users about phishing risks and maintaining robust email filtering and anti-spam controls will reduce the impact of any malicious emails sent via exploitation. Organizations should watch for updates from the vendor and apply patches promptly once released.