July 7, 2025 · Applied Cybernetics Group
CVE-2016-10033 — PHP PHPMailer
PHPMailer Command Injection Vulnerability
- Added to KEV
2025-07-07- Federal due date
2025-07-28- Vendor
- PHP
- Product
- PHPMailer
- EPSS
- 100.0th percentile (score 0.944, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2016-10033
CISA short 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
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.