PHPMailer before 5.2.27 and 6.x before 6.0.6 is vulnerable to an object injection attack.
https://github.com/PHPMailer/PHPMailer/releases/tag/v6.0.6
https://github.com/PHPMailer/PHPMailer/releases/tag/v5.2.27
https://www.debian.org/security/2018/dsa-4351
https://lists.debian.org/debian-lts-announce/2018/12/msg00020.html
Source: MITRE
Published: 2018-11-16
Updated: 2022-12-02
Type: CWE-502
Base Score: 6.8
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 8.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.8
Severity: HIGH