CVE-2026-26862

🔴 HIGH

CleverTap Web SDK version 1.15.2 and earlier is vulnerable to DOM-based Cross-Site Scripting (XSS) via window.postMessage in the Visual Builder module. The origin validation in src/modules/visualBuild...

Published
Feb 27, 2026
Last Modified
Mar 03, 2026
Views
6
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CleverTap Web SDK version 1.15.2 and earlier is vulnerable to DOM-based Cross-Site Scripting (XSS) via window.postMessage in the Visual Builder module. The origin validation in src/modules/visualBuilder/pageBuilder.js (lines 56-60) uses the includes() method to verify the originUrl contains "dashboard.clevertap.com", which can be bypassed by an attacker using a crafted subdomain

Affected Products (1)

clevertap - clevertap_web_sdk

Version: *

CVSS Scores

CVSS 3.1 8.3
8.3
HIGH
CVSS 2.0 8.3

Additional Information

Source
cve@mitre.org
State
Analyzed

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