CVE-2026-26862
DOM-Based XSS in CleverTap Web SDK Visual Builder Module
Publication date: 2026-02-27
Last updated on: 2026-03-03
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| clevertap | clevertap_web_sdk | to 1.15.2 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
| CWE-829 | The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CleverTap Web SDK version 1.15.2 and earlier has a DOM-based Cross-Site Scripting (XSS) vulnerability in its Visual Builder module.
The vulnerability arises because the origin validation in the file src/modules/visualBuilder/pageBuilder.js (lines 56-60) uses the includes() method to check if the originUrl contains "dashboard.clevertap.com".
This validation can be bypassed by an attacker who uses a crafted subdomain, allowing malicious scripts to be executed via window.postMessage.
How can this vulnerability impact me? :
This DOM-based XSS vulnerability can allow an attacker to execute arbitrary scripts in the context of the affected web application.
- Steal sensitive user information such as cookies or session tokens.
- Perform actions on behalf of the user without their consent.
- Potentially deface the website or redirect users to malicious sites.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know