CVE-2025-13742 json
Limited HTML injection in emails
published 2025-11-27 11 mo ago modified 2026-10-19 21 d ago also GHSA-2mm6-624x-fqrr , PYSEC-2025-154 , EUVD-2025-199816
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
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.
Patch / fix
- pypi pretix 2025.7.2, 2025.7.3, 2025.8.2, 2025.9.2
- pretix pretix 2025.7.0, 2025.7.2, 2025.8.0, 2025.8.1, 2025.9.0, 2025.9.1, 2025.10.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11 mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 2.4 | CVSS: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 |
| CNA | 4.0 | 2.4 | CVSS: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 |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | pretix | >=1.0.0, <2025.7.3 >=2025.8.0, <2025.8.2 >=2025.9.0, <2025.9.2 >=1.0.0, <2025.7.2 |
2025.7.3 2025.8.2 2025.9.2 2025.7.2 |
Affected products
- pretix pretix
Classification
- Weakness
-
- CWE-116 Improper Encoding or Escaping of Output
References
-
pretix.eu
/about/en/blog/20251126-release-2025-9-1/
vendor-advisory, broken-link, article
-
nvd.nist.gov
/vuln/detail/CVE-2025-13742
advisory
-
github.com
/pretix/pretix
package
-
github.com
/pypa/advisory-database/tree/main/vulns/pretix/PYSEC-2025-154.yaml
web
-
pretix.eu
/about/en/blog/20251126-release-2025-9-1
web
-
pretix.eu
/about/en/security
web
-
web.archive.org
/web/20251129201933/https://pretix.eu/about/en/blog/20251127-release-2025-9-2
web
-
github.com
/advisories/GHSA-2mm6-624x-fqrr
advisory
Sources
- CVE List CVE-2025-13742
- GitHub Advisory GHSA-2mm6-624x-fqrr
- NVD CVE-2025-13742
- OSV PYSEC-2025-154
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