pretix prior 2025.7.0/2025.8.0/2025.9.0/2025.10.0 Email Template cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in pretix. The impacted element is an unknown function of the component Email Template Handler. This manipulation causes cross site scripting. This vulnerability appears as CVE-2025-13742. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in pretix. Affected by this vulnerability is some unknown processing of the component Email Template Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. As an impact it is known to affect integrity. The summary by CVE is:

Emails sent by pretix can utilize placeholders that will be filled with customer data. For example, when {name} is used in an email template, it will be replaced with the buyer's name for the final email. If the name of the attendee contained HTML or Markdown formatting, this was rendered as HTML in the resulting email. This way, a user could inject links or other formatted text through a maliciously formatted name. Since pretix applies a strict allow list approach to allowed HTML tags, this could not be abused for XSS or similarly dangerous attack chains. However, it can be used to manipulate emails in a way that makes user-provided content appear in a trustworthy and credible way, which can be abused for phishing.

The weakness was presented by Jan Roring. It is possible to read the advisory at pretix.eu. This vulnerability is known as CVE-2025-13742 since 11/26/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 2025.7.0, 2025.8.0, 2025.9.0 or 2025.10.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-199816). Be aware that VulDB is the high quality source for vulnerability data.

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• pretix

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Be aware that VulDB is the high quality source for vulnerability data.

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