What’s Vulnerable › Vulnerabilities

CVE-2018-12391

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-02-28 · updated 2026-06-17
• Weakness: CWE-863

Description

During HTTP Live Stream playback on Firefox for Android, audio data can be accessed across origins in violation of security policies. Because the problem is in the underlying Android service, this issue is addressed by treating all HLS streams as cross-origin and opaque to access. *Note: this issue only affects Firefox for Android. Desktop versions of Firefox are unaffected.*. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.

Affected products

• Mozilla Firefox: before 63.0 — fixed in 63.0
• Mozilla Firefox ESR: before 60.3 — fixed in 60.3
• Mozilla Thunderbird: before 60.3 — fixed in 60.3

How to fix

Upgrade to a fixed version: Mozilla Firefox 63.0; Mozilla Firefox ESR 60.3; Mozilla Thunderbird 60.3. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/105718
• http://www.securityfocus.com/bid/105769
• http://www.securitytracker.com/id/1041944
• https://bugzilla.mozilla.org/show_bug.cgi?id=1478843
• https://security.gentoo.org/glsa/201811-13
• https://www.mozilla.org/security/advisories/mfsa2018-26/
• https://www.mozilla.org/security/advisories/mfsa2018-27/
• https://www.mozilla.org/security/advisories/mfsa2018-28/
• http://www.securityfocus.com/bid/105718
• http://www.securityfocus.com/bid/105769
• http://www.securitytracker.com/id/1041944
• https://bugzilla.mozilla.org/show_bug.cgi?id=1478843

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