High (7.5). EPSS 3.8% chance of exploitation in the next 30 days.
PHPMailer before 6.1.6 contains an output escaping bug when the name of a file attachment contains a double quote character. This can result in the file type being misinterpreted by the receiver or any mail relay processing the message.
Severity
CVSS 3.1
7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
3.8% chance of exploitation in the next 30 days; higher than 89% of CVEs (scores of 2026-10-31)