Description

smartbanner.js is a customizable smart app banner for iOS and Android. Prior to version 1.14.1, clicking on smartbanner `View` link and navigating to 3rd party page leaves `window.opener` exposed. It may allow hostile third parties to abuse `window.opener`, e.g. by redirection or injection on the original page with smartbanner. `rel="noopener"` is automatically populated to links as of `v1.14.1` which is a recommended upgrade to resolve the vulnerability. Some workarounds are available for those who cannot upgrade. Ensure `View` link is only taking users to App Store or Google Play Store where security is guarded by respective app store security teams. If `View` link is going to a third party page, limit smartbanner.js to be used on iOS that decreases the scope of the vulnerability since as of Safari 12.1, `rel="noopener"` is imposed on all `target="_blank"` links. Version 1.14.1 of smartbanner.js contains a fix for the issue.

Classification

CVE ID: CVE-2025-25300

CVSS Base Severity: LOW

CVSS Base Score: 1.3

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:U

Affected Products

Vendor: ain

Product: smartbanner.js

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.06% (probability of being exploited)

EPSS Percentile: 14.94% (scored less or equal to compared to others)

EPSS Date: 2025-03-19 (when was this score calculated)

References

https://github.com/ain/smartbanner.js/security/advisories/GHSA-9mrq-cjgh-32g2
https://github.com/ain/smartbanner.js/security/advisories/GHSA-9mrq-cjgh-32g2
https://github.com/ain/smartbanner.js/commit/fce8c31dfe04033d9d005a89694d3e7a60784f89

Timeline