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CVE-2025-13742

Limited HTML injection in emails

2.4 LowFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
High
Integrity
Low
Availability
Low

Exploit likelihood

0.19%Up 0.2 points since Nov 27, 2025
90%50%10%1%

What each source reports

CVE List Score used 2.4

Limited HTML injection in emails

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.

Record
CVE-2025-13742
CVSS 4.0
2.4 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:L/SC:N/SI:L/SA:L/E:U
Weakness
CWE-116
Updated
2026-11-02
EUVDEUVD-2025-199816 2.4

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.

Record
EUVD-2025-199816
CVSS 4.0
2.4 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:L/SC:N/SI:L/SA:L/E:U
Updated
2026-11-02
GitHub AdvisoriesGHSA-2mm6-624x-fqrr 2.4

pretix has Email Content Injection Through Maliciously Formatted Names

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.

Record
GHSA-2mm6-624x-fqrr
CVSS 4.0
2.4 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:L/SC:N/SI:L/SA:L/E:U
Weakness
CWE-116
Updated
2026-11-02
NVD 2.4

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.

Record
CVE-2025-13742
CVSS 4.0
2.4 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:L/SC:N/SI:L/SA:L/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-116
Updated
2026-11-02
OSV 2.4

Limited HTML injection in emails

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.

Record
CVE-2025-13742
CVSS 4.0
2.4 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:L/SC:N/SI:L/SA:L/E:U
Updated
2026-11-02
OSVGHSA-2mm6-624x-fqrr 2.4

pretix has Email Content Injection Through Maliciously Formatted Names

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.

Record
GHSA-2mm6-624x-fqrr
CVSS 4.0
2.4 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:L/SC:N/SI:L/SA:L/E:U
Weakness
CWE-116
Updated
2026-11-02
OSVPYSEC-2025-154 6.1

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.

Record
PYSEC-2025-154
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
pretix
PyPI
1.0.0 up to 2025.7.3
2025.7.3
pretix
PyPI
2025.8.0 up to 2025.8.2
2025.8.2
pretix
PyPI
2025.9.0 up to 2025.9.2
2025.9.2
pretix
PyPI
1.0.0 up to 2025.7.3, plus listed versions
1.1.01.1.11.1.21.1.31.10.0
Show 45 moreShow less
1.10.11.11.01.11.11.12.01.12.11.13.01.13.11.14.01.15.01.15.11.15.21.16.01.17.01.17.11.2.01.2.1.post21.2.21.3.01.3.0.post11.3.11.4.01.4.11.5.01.5.11.5.21.6.01.6.11.6.21.7.11.7.21.8.01.8.11.9.01.9.12.0.02.1.02.2.02.3.02.4.02.5.02.6.02.7.02.7.12.7.22.8.2
2025.7.3
pretix
PyPI
2025.8.0 up to 2025.8.2, plus listed versions
2025.8.1
2025.8.2
pretix
PyPI
2025.9.0 up to 2025.9.2, plus listed versions
2025.9.1
2025.9.2
pretix
PyPI
1.0.0 up to 2025.7.2, plus listed versions
1.1.01.1.11.1.21.1.31.10.0
Show 45 moreShow less
1.10.11.11.01.11.11.12.01.12.11.13.01.13.11.14.01.15.01.15.11.15.21.16.01.17.01.17.11.2.01.2.1.post21.2.21.3.01.3.0.post11.3.11.4.01.4.11.5.01.5.11.5.21.6.01.6.11.6.21.7.11.7.21.8.01.8.11.9.01.9.12.0.02.1.02.2.02.3.02.4.02.5.02.6.02.7.02.7.12.7.22.8.2
2025.7.2

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-13742 is a low vulnerability (CVSS 2.4) in Pretix, published November 27, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.19%, the 9th percentile. Fixed in pretix 2025.7.3.

References

This page doesn't list everything

Left out here: 211 versions. The JSON record has them.

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