CVE-2026-57533
LowCVSS 2.1Summary
Malicious HTML content could be injected into the page pretix shows when redirection to an untrusted page occurs. Since this page has a Content-Security-Policy, this can mainly be used for phishing purposes.
Risk Assessment
The organization is exposed to phishing attacks where users may be redirected to fake pages resembling legitimate ones, potentially leading to theft of login credentials or other sensitive information.
Recommendation
Update pretix to the latest version that includes a fix preventing malicious HTML injection. Additionally, consider strengthening the CSP policy and validating all redirects.
Other vulnerabilities in pretix
See all- CVE-2026-13225Medium
Malicious HTML content could be injected into the email address of an order, which pretix showed without sanitization on the confirmation page for individual tickets in that order.
- CVE-2026-13602High
A chain of vulnerabilities was found in pretix: payment plugins (Stripe, Mollie, OPPWA, BitPay, Payone, SecuConnect, Sofort, Saferpay) do not validate session parameters beyond cryptographic signature, the redirect feature uses the same key and salt for signing as the plugins, and the admin impersonation feature allows changing user after injecting arbitrary parameters. An attacker with access to at least one event can become any backend user and access all data.
- CVE-2026-5600Medium
Pretix 2025 introduces a new API endpoint that returns check-in data for all events of an organizer instead of a specific event. This allows unauthorized users to access check-in information for other events.
Original NVD description (English source)
Malicious HTML content could be injected into the page pretix shows when redirection to an untrusted page occurs. Since this page has a Content-Security-Policy, this can mainly be used for phishing purposes.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS