What’s Vulnerable › Vulnerabilities

CVE-2016-9073

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-06-11 · updated 2026-06-17
• Weakness: CWE-264

Description

WebExtensions can bypass security checks to load privileged URLs and potentially escape the WebExtension sandbox. This vulnerability affects Firefox < 50.

Affected products

• Mozilla Firefox: before 50.0 — fixed in 50.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 50.0. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/94337
• http://www.securitytracker.com/id/1037298
• https://bugzilla.mozilla.org/show_bug.cgi?id=1289273
• https://www.mozilla.org/security/advisories/mfsa2016-89/
• http://www.securityfocus.com/bid/94337
• http://www.securitytracker.com/id/1037298
• https://bugzilla.mozilla.org/show_bug.cgi?id=1289273
• https://www.mozilla.org/security/advisories/mfsa2016-89/

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