CVE-2026-2440 SurveyJS: Drag & Drop Form Builder <= 2.5.3 - Unauthenticated Stored Cross-Site Scripting
Unauthenticated attackers can inject malicious scripts via survey submissions that execute in the admin context when results are viewed.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2440?
CVE-2026-2440 is a high-severity cross-site scripting vulnerability in devsoftbaltic SurveyJS: Drag & Drop Form Builder, published on 21 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The SurveyJS plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.5.3 via survey result submissions. This is due to insufficient input sanitization and output escaping. The public survey page exposes the nonce required for submission, allowing unauthenticated attackers to submit HTML-encoded payloads that are decoded and rendered as executable HTML when an administrator views survey results, leading to stored XSS in the admin context.
Weakness: CWE-79
Which versions are affected by CVE-2026-2440?
How do I fix CVE-2026-2440?
No fix has been published for CVE-2026-2440 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-2440 being exploited?
There is no known exploitation of CVE-2026-2440 in the wild and no public exploit code.
Sources
Also known as GHSA-v39q-6w5w-5842.