Freeform Craft Plugin CP UI (builder/integrations) has Stored Cross-Site Scripting (XSS) issue
Summary
An authenticated, low-privilege user (able to create/edit forms) can inject arbitrary HTML/JS into the Craft Control Panel (CP) builder and integrations views. User-controlled form labels and integration metadata are rendered with dangerouslySetInnerHTML without sanitization, leading to stored XSS that executes when any admin views the builder/integration screens.
Affected Product
- Ecosystem: Packagist (Craft CMS plugin)
- Package: solspace/craft-freeform
- Version: <= 5.14.6 (latest observed). Likely all 5.x until patched.
Details
- Root cause: Multiple user-controlled strings (field labels, section labels, integration icons, short names, WYSIWYG previews) are injected into React components using
dangerouslySetInnerHTMLwithout sanitization. - Evidence:
dangerouslySetInnerHTMLon user-controlled properties in bundled CP JS at packages/plugin/src/Resources/js/client/client.js.
PoCs
- Label-based XSS:
- In Craft CP, create/edit a Freeform field and set its label to
<img src=x onerror="alert('xss-label')">. - Open the form builder view containing the field.
- Alert executes (stored XSS).
- In Craft CP, create/edit a Freeform field and set its label to
- Integration icon SVG:
- Set an integration "icon SVG" to
<svg><script>alert('xss-icon')</script></svg>. - Open the integrations CP view.
- Script executes.
- Set an integration "icon SVG" to
Impact Arbitrary JS in admin CP; session/CSRF token theft; potential full admin takeover via DOM-driven actions.
Remediation
- Sanitize/HTML-encode all user-controlled strings before passing to
dangerouslySetInnerHTML, or avoid it for labels/titles/icons. - Server-side: strip/escape disallowed tags on save for fields, integration metadata, WYSIWYG content.
- Add regression tests with
<img onerror>payloads to ensure no execution in builder/integration views.
Workarounds
- Restrict form-edit permissions to trusted admins only until patched.
- Consider CSP that disallows inline scripts (defense-in-depth only).
Credits
- Discovered by https://www.linkedin.com/in/praveenkavinda/ | Prav33N-Sec.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | solspace/craft-freeform | >= 5.0.0, < 5.14.7 | 5.14.7 |
References
- https://github.com/solspace/craft-freeform/security/advisories/GHSA-jp3q-wwp3-pwv9
- https://nvd.nist.gov/vuln/detail/CVE-2026-26188
- https://github.com/solspace/craft-freeform/commit/b9adad6cdf1eba5400aae8b1ae39bd7d4d33af5e
- https://github.com/solspace/craft-freeform
- https://github.com/solspace/craft-freeform/releases/tag/v5.14.7
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P- Weakness (CWE)
CWE-79- Platform
- Composer
- Package
solspace/craft-freeform- Disclosed
- 22.01.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-jp3q-wwp3-pwv9 - CC BY 4.0
Vulnerability history: solspace/craft-freeform
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 08.2025 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- Medium 1
- Low 4
Disclosures per year
- 2025: 1
- 2026: 5
-
Freeform Craft Plugin CP UI (builder/integrations) has Stored Cross-Site Scripting (XSS) issue this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.