CVE-2016-10033—PHPMailer Command Injection Vulnerability

Vulnerability Name

PHPMailer Command Injection Vulnerability

Description

PHPMailer contains a command injection vulnerability because it fails to sanitize user-supplied input. Specifically, this issue affects the 'mail()' function of 'class.phpmailer.php' script. An attacker can exploit this issue to execute arbitrary code within the context of the application. Failed exploit attempts will result in a denial-of-service condition.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:

Unknown

Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Additional Notes

• This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/PHPMailer/PHPMailer/releases/tag/v5.2.18
• https://github.com/advisories/GHSA-5f37-gxvh-23v6
• https://nvd.nist.gov/vuln/detail/CVE-2016-10033

Related News Articles

• CISA Adds Four Critical Vulnerabilities to KEV Catalog Due to Active ExploitationJuly 8, 2025

Related Weaknesses

• CWE-77
• CWE-88