CVE-2016-10033
PHPMailer Command Injection Vulnerability
- Published
- Dec 30, 2016
- Updated
- Oct 21, 2025
- Assigning CNA
- mitre
- Evidence observed
- Dec 25, 2016
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 100.0%
- Model date
- Oct 15, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
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.
Sources
http/cves/2016/CVE-2016-10033.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: status,word($.matchers[*].type)
modules/exploits/multi/http/phpmailer_arg_injection.rb
Metasploit Framework modulesDeclared conditions
- platform: PHP($.exploit_multi/http/phpmailer_arg_injection.platform)
- verification: check_not_declared($.exploit_multi/http/phpmailer_arg_injection.check)
modules/exploits/unix/webapp/wp_phpmailer_host_header.rb
Metasploit Framework modulesDeclared conditions
- platform: Linux($.exploit_unix/webapp/wp_phpmailer_host_header.platform)
- verification: check_declared($.exploit_unix/webapp/wp_phpmailer_host_header.check)
Responsible use
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