| Package | Affected versions | Patched versions |
|---|---|---|
| clevertap web sdk | ≤ 1.15.2 | |
| clevertap-web-sdk | < 1.15.3 | 1.15.3 |
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 includes() method, which can be bypassed by an attacker using a subdomain.
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