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 em
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | pretix | >= 1.0.0, < 2025.7.2 | 2025.7.2 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-13742
- https://github.com/pretix/pretix
- https://github.com/pypa/advisory-database/tree/main/vulns/pretix/PYSEC-2025-154.yaml
- https://pretix.eu/about/en/blog/20251126-release-2025-9-1
- https://pretix.eu/about/en/security
- https://web.archive.org/web/20251129201933/https://pretix.eu/about/en/blog/20251127-release-2025-9-2
- https://pretix.eu/about/en/blog/20251126-release-2025-9-1/
- https://github.com/advisories/GHSA-2mm6-624x-fqrr
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-116- Platform
- Python (PyPI)
- Package
pretix- Disclosed
- 27.11.2025
- Updated
- 11.10.2026 12:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-2mm6-624x-fqrr - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2025-154 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: pretix
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 11
- First → latest
- 03.2023 05.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 6
- Low 3
Disclosures per year
- 2023: 3
- 2024: 2
- 2025: 3
- 2026: 3
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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 em this entry
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