admin.php?page=notification_by_mail in Piwigo 2.9.5 has XSS via the nbm_send_html_mail, nbm_send_mail_as, nbm_send_detailed_content, nbm_complementary_mail_content, nbm_send_recent_post_dates, or param_submit parameter. This is exploitable via CSRF.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
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