CVE-2023-5098: campaign monitor optin cat vulnerability

What is known

The Campaign Monitor Forms by Optin Cat WordPress plugin before 2.5.6 does not prevent users with low privileges (like subscribers) from overwriting any options on a site with the string "true", which could lead to a variety of outcomes, including DoS.

Business impact

Successful exploitation of CVE-2023-5098, a high vulnerability (CVSS 8.1) affecting campaign monitor optin cat, may affect the confidentiality, integrity or availability of the vulnerable environment. The exact impact depends on the installed version, exposed interfaces and deployment configuration.

Recommended administrator action

Confirm whether campaign monitor optin cat is present and compare installed versions with the vendor advisory and NVD record. Apply the vendor patch or documented mitigation; until remediation is complete, reduce exposure of affected interfaces, review relevant logs and monitor for indicators of exploitation. DataHouse can support version verification, managed patching, network exposure reduction, log review and backup validation for dedicated, cloud and colocated environments.

Sources

• NVD
• Reference