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Vulnerability record · CVE-2023-29540 · published 2 June 2023

CVE-2023-29540: Mozilla firefox open redirect vulnerability

Mozilla · Firefox

Using a redirect embedded into <code>sourceMappingUrls</code> could allow for navigation to external protocol links in sandboxed iframes without <code>allow-top-navigation-to-custom-protocols</code>. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

6.1 CVSS 3.1 Medium EPSS 0.32% · top 77.8% CWE-601 · Open redirect
6.1CVSS 3.1 base score
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
4References
19 Aug 2026Last modified by NVD

Description

Using a redirect embedded into <code>sourceMappingUrls</code> could allow for navigation to external protocol links in sandboxed iframes without <code>allow-top-navigation-to-custom-protocols</code>. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.mozilla.org/show_bug.cgi?id=1790542 Issue TrackingPermissions RequiredVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-13/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1790542 Issue TrackingPermissions RequiredVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-13/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-29540), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.