What is CVE-2026-2440?

CVE-2026-2440 is a high-severity vulnerability in Devsoftbaltic Surveyjs: Drag & Drop Form Builder, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-03-21.

How severe is CVE-2026-2440?

High severity. CVSS v3 base score is 7.2 out of 10.

XSS in Devsoftbaltic Surveyjs: Drag & Drop Form Builder

CVE-2026-2440

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (20.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Devsoftbaltic Surveyjs: Drag & Drop Form Builder — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-2440?: CVE-2026-2440 is a high-severity vulnerability in Devsoftbaltic Surveyjs: Drag & Drop Form Builder, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-03-21.
How severe is CVE-2026-2440?: High severity. CVSS v3 base score is 7.2 out of 10.