CVE-2016-10033 — PHPMailer Command Injection Vulnerability
CVE-2016-10033: PHPMailer Command Injection Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | PHP |
| Product | PHPMailer |
| Date added | 2025-07-07 |
| Due date | 2025-07-28 |
| Ransomware campaign use | Unknown |
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-10033
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog