VulnerabilityDeferred

CVE-2025-51684

CleverTap Web SDK v1.15.1 is vulnerable to Cross Site Scripting (XSS).

MEDIUM 6.1EPSS 0.26%

Does this matter?

Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own.

Description

CleverTap Web SDK v1.15.1 is vulnerable to Cross Site Scripting (XSS). The application does not sanitize untrusted data received via window.postMessage before injecting it into the page DOM. An attacker can craft a malicious message that, when processed by renderCustomHtml, results in execution of arbitrary JavaScript in the context of the hosting site.

CVSS 3.1: 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.26% probability · 18th percentile
CISA KEV: Not listed
Weakness: CWE-79
Source: cve@mitre.org

References

https://github.com/CleverTap/clevertap-web-sdk/issues/416
https://github.com/CleverTap/clevertap-web-sdk/issues/416

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.