pretix pretix-doistep up to 1.3.1 Placeholder dynamic variable evaluation

Summaryinfo

A vulnerability categorized as problematic has been discovered in pretix pretix-doistep up to 1.3.1. Impacted is an unknown function of the component Placeholder Handler. Executing a manipulation can lead to dynamic variable evaluation. This vulnerability is handled as CVE-2026-2451. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in pretix pretix-doistep up to 1.3.1. This vulnerability affects an unknown functionality of the component Placeholder Handler. The manipulation with an unknown input leads to a dynamic variable evaluation vulnerability. The CWE definition for the vulnerability is CWE-627. In a language where the user can influence the name of a variable at runtime, if the variable names are not controlled, an attacker can read or write to arbitrary variables, or access arbitrary functions. As an impact it is known to affect confidentiality. CVE summarizes:

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. This mechanism contained a security-relevant bug: It was possible to exfiltrate information about the pretix system through specially crafted placeholder names such as {{event.__init__.__code__.co_filename}}. This way, an attacker with the ability to control email templates (usually every user of the pretix backend) could retrieve sensitive information from the system configuration, including even database passwords or API keys. pretix does include mechanisms to prevent the usage of such malicious placeholders, however due to a mistake in the code, they were not fully effective for this plugin. Out of caution, we recommend that you rotate all passwords and API keys contained in your pretix.cfg file.

The advisory is available at pretix.eu. This vulnerability was named CVE-2026-2451 since 02/13/2026. The exploitation appears to be difficult. The attack can be initiated remotely. The technical details are unknown and an exploit is not available.

Upgrading to version 1.3.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-6096). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• pretix

Name

• pretix-doistep

Version

• 1.3.0
• 1.3.1

CPE 2.3info

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• 🔒

CPE 2.2info

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• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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