What’s Vulnerable › Vulnerabilities

CVE-2023-29540

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-02 · updated 2026-08-19
• Weakness: CWE-601

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.

Affected products

• Mozilla Firefox: before 112.0 — fixed in 112.0
• Mozilla Firefox for Android: before 112.0 — fixed in 112.0
• Mozilla Focus: before 112.0 — fixed in 112.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 112.0; Mozilla Firefox for Android 112.0; Mozilla Focus 112.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1790542
• https://www.mozilla.org/security/advisories/mfsa2023-13/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1790542
• https://www.mozilla.org/security/advisories/mfsa2023-13/

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