In short
- CVE-2026-25496 is a MEDIUM (CVSS 4.8) vulnerability affecting craftcms/cms, craft cms (craftcms).
- Chance of exploitation in the next 30 days (EPSS): 0.42%, higher than 35.9% of all vulnerabilities.
- Fix: update to 4.16.18, 5.8.22 or later.
| Package | Affected versions | Patched versions |
|---|
| craftcms/cms Packagist | ≥ 4.0.0-RC1, < 4.16.18≥ 5.0.0-RC1, < 5.8.22
| 4.16.185.8.22
|
| craft cms | = 4.0.0= 5.0.0> 4.0.0, < 4.16.18> 5.0.0, < 5.8.22
| 4.16.185.8.22
|
Description
Summary
A stored XSS vulnerability exists in the Number field type settings. The Prefix and Suffix fields are rendered using the |md|raw Twig filter without proper escaping, allowing script execution when the Number field is displayed on users' profiles.
Proof of Concept
Required Permissions
Steps to Reproduce
- Log in with an admin account
- Navigate to Settings → Fields → New field
- Choose Number as the field type
- Set the Prefix/Suffix Text field to: <img width="611" height="908" alt="image" src="https://github.com/user-attachments/assets/63766ca4-4fa9-490b-8bea-37364137527d" />
<img src=x onerror="alert('Number Prefix/Suffix XSS')" hidden>
- Save the field
- Add this field to any element (e.g., User Profile fields via Settings → Users → User Fields)
- Navigate to your account (
/admin/myaccount) or any user profile (/admin/users/{id})
- XSS executes when viewing the form <img width="1246" height="677" alt="image-1" src="https://github.com/user-attachments/assets/dafeb2b7-905f-4a4b-b3d6-1c16a905498f" />
Mitigation
Sanitize prefix/suffix before rendering or use |e filter instead of |raw.
NVD description
Craft is a platform for creating digital experiences. In Craft versions 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21, a stored XSS vulnerability exists in the Number field type settings. The Prefix and Suffix fields are rendered using the |md|raw Twig filter without proper escaping, allowing script execution when the Number field is displayed on users' profiles. This issue is patched in versions 4.16.18 and 5.8.22.
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