8.3

CVE-2026-26861

Exploit
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
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Clevertap ≫ Clevertap Web Sdk Version <= 1.15.2
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.02% 0.035
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 8.3 2.8 5.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
CWE-346 Origin Validation Error

The product does not properly verify that the source of data or communication is valid.

https://github.com/CleverTap/clevertap-web-sdk/issues/424
Vendor Advisory
Exploit
Issue Tracking