References to Advisories, Solutions, and Tools

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Change History

pretalx is a conference planning tool. Prior to 2026.1.0, an unauthenticated attacker can send arbitrary HTML-rendered emails from a pretalx instance's configured sender address by embedding malformed HTML or markdown link syntax in a user-controlled template placeholder such as the account display name. The most direct vector is the password-reset flow: the attacker registers an account with a malicious name, enters the victim's email address, and triggers a password reset. The resulting email is delivered from the event's legitimate sender address and passes SPF/DKIM/DMARC validation, making it a ready-made phishing vector. This vulnerability is fixed in 2026.1.0.

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE-79

CWE-116

https://github.com/pretalx/pretalx/security/advisories/GHSA-jm8c-9f3j-4378