Deserialization of Untrusted Data in PHPMailer - CVE-2020-36326
Published: May 4, 2021
Vulnerability identifier: #VU52850
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-36326
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data in "addAttachment". A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
PHPMailer
Moodle
ChurchCRM
Fedora
php-phpmailer6
Moodle
ChurchCRM
Fedora
php-phpmailer6
How to mitigate CVE-2020-36326
Install updates from vendor's website.
PHPMailer - update to 6.4.1
Moodle - addressed in versions 3.9.13, 3.10.10, 3.11.6
ChurchCRM - update to 4.4.3
php-phpmailer6 - addressed in versions 6.4.1-1.fc33, 6.4.1-1.fc34
Moodle - addressed in versions 3.9.13, 3.10.10, 3.11.6
ChurchCRM - update to 4.4.3
php-phpmailer6 - addressed in versions 6.4.1-1.fc33, 6.4.1-1.fc34