Summary
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.
Impact
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Remediation advice
pretix to 2025.7.3 or later; pretix to 2025.8.2 or later; pretix to 2025.9.2 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2025-13742? CVE-2025-13742 is a low-severity security vulnerability in pretix (pip), affecting versions >= 1.0.0, < 2025.7.3. It is fixed in 2025.7.3, 2025.8.2, 2025.9.2.
- Which versions of pretix are affected by CVE-2025-13742? pretix (pip) versions >= 1.0.0, < 2025.7.3 is affected.
- Is there a fix for CVE-2025-13742? Yes. CVE-2025-13742 is fixed in 2025.7.3, 2025.8.2, 2025.9.2. Upgrade to this version or later.
- Is CVE-2025-13742 exploitable, and should I be worried? Whether CVE-2025-13742 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2025-13742 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2025-13742?
- Upgrade
pretixto 2025.7.3 or later - Upgrade
pretixto 2025.8.2 or later - Upgrade
pretixto 2025.9.2 or later
- Upgrade