mime.php in SquirrelMail through 1.4.23-svn-20250401 and 1.5.x through 1.5.2-svn-20250401 allows XSS via e-mail headers, because JavaScript payloads are mishandled after $encoded has been set to true.
https://squirrelmail.org/security/issue.php?d=2025-04-02
https://squirrelmail.org
Source: Mitre, NVD
Published: 2025-04-02
Updated: 2025-04-02
Base Score: 6.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N
Severity: Medium
Base Score: 7.2
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Severity: High
EPSS: 0.00029