Improper Input Validation Affecting pretix package, versions [4.14.0,2026.3.5.post1)[2026.4.0,2026.4.5)[2026.5.0,2026.5.3)
Threat Intelligence
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The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-PRETIX-17756763
- published1 Jul 2026
- disclosed1 Jul 2026
- creditUnknown
Introduced: 1 Jul 2026
NewCVE-2026-13602 (opens in a new tab)How to fix?
Upgrade pretix to version 2026.3.5.post1, 2026.4.5, 2026.5.3 or higher.
Overview
pretix is a Reinventing presales, one ticket at a time
Affected versions of this package are vulnerable to Improper Input Validation via improper validation of session parameters in the payment integration plugins and the use of shared cryptographic keys and salts across unrelated features. An attacker can gain unauthorized access to any user account by injecting specially crafted, cryptographically signed session parameters and exploiting the impersonation functionality. This is only exploitable if the attacker has access to at least one event in the backend.
Workaround
This vulnerability can be mitigated by blocking the URL /control/users/impersonate/stop in your webserver configuration.