The isMail transport in PHPMailer before 5.2.20 might allow remote attackers to pass extra parameters to the mail command and consequently e

Summary

The isMail transport in PHPMailer before 5.2.20 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code by leveraging improper interaction between the escapeshellarg function and internal escaping performed in the mail function in PHP. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-10033.

Timeline

1. Dec 27, 2016Public exploit on Exploit-DB

   EDB-40969, EDB-40986, EDB-42221

2. Dec 30, 2016, 7:00 PM UTCCVE published
3. Aug 6, 2024, 3:07 AM UTCRecord last updated
4. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• n/a n/a

  Version range not reported

• phpmailer/phpmailerPackagist

  From 5.0.0 · fixed in 5.2.20

References 19