Vulnerability Intelligence Report
PHPMailer Command Injection Vulnerability
CVE-2016-10033
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.
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:99.71%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-88 ↗CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| phpmailer_project | phpmailer | all |
| wordpress | wordpress | all |
| joomla | joomla\! | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
99.714%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | MITRE Corporation · N/A · USA |
| Reserved | 2016-12-22T00:00:00 |
| Published | 2016-12-30T19:00:00 |
| Patch Date | 2016-12-25 |
| Last Updated | 2025-10-21T23:55:47 |
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