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CVE-2016-10033

PHPMailer Command Injection Vulnerability

n/a
CVSS
99.7%
EPSS (exploit prob.)
100.0%
EPSS percentile
Yes
Actively exploited
No
Ransomware use
2025-07-07
Added

MITRE ATT&CK techniques

How this vulnerability maps to adversary behaviour, from the Center for Threat-Informed Defense's public CVE→ATT&CK mappings. Use it to check whether your detections already cover the technique.

TechniqueNameRelationship
T1190 Exploit Public-Facing Application exploitation technique
T1059.004 Unix Shell primary impact

Summary

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.

Affected software

Vendor: PHP  ·  Product: PHPMailer

Weakness types (CWE):

CWE-77CWE-88

What to do

This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.

Related vulnerabilities in PHP

CVENameEPSSExploited
CVE-2012-1823 PHP-CGI Query String Parameter Vulnerability 100.0% Yes
CVE-2019-11043 PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability 99.4% Yes

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