How severe is CVE-2025-25300?

CVE-2025-25300 has a CVSS 4.0 base score of 1.3, rated low severity.

Is CVE-2025-25300 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-25300?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-25300 have an EU (EUVD) identifier?

Yes. CVE-2025-25300 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-0661.

When was CVE-2025-25300 published?

CVE-2025-25300 was published on 2025-02-18 and last updated on 2026-06-17.

CVE-2025-25300

CVE-2025-25300 is a low-severity vulnerability with a CVSS 4.0 base score of 1.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Low (CVSS 4.0 base score 1.3)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2019-0661
Weakness: CWE-79
Published: 2025-02-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-25300?: 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.
How severe is CVE-2025-25300?: CVE-2025-25300 has a CVSS 4.0 base score of 1.3, rated low severity.
Is CVE-2025-25300 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-25300?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-25300 have an EU (EUVD) identifier?: Yes. CVE-2025-25300 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-0661.
When was CVE-2025-25300 published?: CVE-2025-25300 was published on 2025-02-18 and last updated on 2026-06-17.

References

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