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CISA Known Exploited Vulnerability

This CVE is actively exploited in the wild. CISA mandates federal agencies to patch immediately.

CVE

CVE-2016-10033

9.8

CVSScritical

Exploitable remotely over the internet · no authentication required.

Description

The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a \" (backslash double quote) in a crafted Sender property.

Attack Vector

Network

Privileges Req.

None

User Interaction

None

Updated Oct 12, 2026View on NVD →

S4E scanner

criticalProduct Based Web Vulnerabilities~15 seconds

CVE-2016-10033 Scanner

CVE-2016-10033 scanner - Remote Code Execution (RCE) vulnerability in isMail transport in PHPMailer

Used 2.2k times · 3.4k assets checked · domain, ipv4, subdomain

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