Impact
The notification emails sent for notifications for missed messages or for an expiring account are subject to HTML injection. In the case of the notification for missed messages, this could allow an attacker to insert forged content into the email.
The account expiry feature is not enabled by default and the HTML injection is not controllable by an attacker.
Patches
This issue is fixed in #9200.
Workarounds
For the missed messages notifications:
The notif.html, notif_mail.html, and room.html templates can be overridden with custom templates that manually escapes the variables using JInja2's escape filter. See the email.template_dir setting.
For the account expiry notifications:
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Account expiry can be disabled via the account_validity.enabled setting.
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The notice_expiry.html template can be overridden with a custom template that manually escapes the variables using JInja2's escape filter. See the email.template_dir setting.
Impact
The notification emails sent for notifications for missed messages or for an expiring account are subject to HTML injection. In the case of the notification for missed messages, this could allow an attacker to insert forged content into the email.
The account expiry feature is not enabled by default and the HTML injection is not controllable by an attacker.
Patches
This issue is fixed in #9200.
Workarounds
For the missed messages notifications:
The
notif.html,notif_mail.html, androom.htmltemplates can be overridden with custom templates that manually escapes the variables using JInja2'sescapefilter. See theemail.template_dirsetting.For the account expiry notifications:
Account expiry can be disabled via the
account_validity.enabledsetting.The
notice_expiry.htmltemplate can be overridden with a custom template that manually escapes the variables using JInja2'sescapefilter. See theemail.template_dirsetting.