Open-Source Security Intelligence

Know every vulnerability
before it knows you.

DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.

Checkout DevGuardView on GitHub
Search

GHSA-9f5h-mmq6-2x78

MediumCVSS 4.8 / 10
Published Feb 9, 2026·Last modified Feb 22, 2026
Affected Components(0)

No affected components available

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

  1. Log in with an admin account
  2. Navigate to Settings → Fields → New field
  3. Choose Number as the field type
  4. 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>
  1. Save the field
  2. Add this field to any element (e.g., User Profile fields via Settings → Users → User Fields)
  3. Navigate to your account (/admin/myaccount) or any user profile (/admin/users/{id})
  4. 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.

Risk Scores
Base Score
4.8

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges.

Threat Intelligence
1.1

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS
0.36%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Browse More

Medium severity
Scan your project

Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.

Checkout DevGuard