CVE-2026-26188: Solspace Freeform plugin affected by Stored Cross-Site Scripting (XSS) in Freeform Craft Plugin CP UI (builder/integrations)
Solspace Freeform plugin for Craft CMS 5.x is a super flexible form-building tool. 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. This vulnerability is fixed in 5.14.7.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-26188?
CVE-2026-26188 has been classified as a medium severity vulnerability due to its ability to allow stored cross-site scripting (XSS).
How do I fix CVE-2026-26188?
To fix CVE-2026-26188, update the Solspace Freeform plugin to version 5.14.8 or later.
What types of users are affected by CVE-2026-26188?
CVE-2026-26188 affects authenticated low-privilege users who can create or edit forms in the Solspace Freeform plugin.
What is the impact of exploiting CVE-2026-26188?
Exploiting CVE-2026-26188 can allow an attacker to inject arbitrary HTML or JavaScript into the Freeform Craft Plugin CP UI.
What software versions are affected by CVE-2026-26188?
CVE-2026-26188 affects Solspace Freeform versions up to and including 5.14.7.