Clevertap Web SDK vulnerabilities

2 known vulnerabilities in Clevertap Web SDK from CleverTap. 2 are rated high or critical. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 8.3 High severity

  Clevertap Web SDK: Improper Neutralization of Input During Web Page Generation

  CVE-2026-26862Feb 27, 2026CleverTap

  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 t

• 8.3 High severity

  Clevertap Web SDK: Origin Validation Error

  CVE-2026-26861Feb 27, 2026CleverTap

  CleverTap Web SDK version 1.15.2 and earlier is vulnerable to Cross-Site Scripting (XSS) via window.postMessage. The handleCustomHtmlPreviewPostMessageEvent function in src/util/campaignRender/nativeDisplay.js performs insufficient origin validation using the