What’s Vulnerable › Vulnerabilities

CVE-2017-7816

• Severity: medium (CVSS 5.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-06-11 · updated 2026-06-17
• Weakness: CWE-20

Description

WebExtensions could use popups and panels in the extension UI to load an "about:" privileged URL, violating security checks that disallow this behavior. This vulnerability affects Firefox < 56.

Affected products

• Mozilla Firefox: through 55.0.3

References

• http://www.securityfocus.com/bid/101057
• http://www.securitytracker.com/id/1039465
• https://bugzilla.mozilla.org/show_bug.cgi?id=1380597
• https://www.mozilla.org/security/advisories/mfsa2017-21/
• http://www.securityfocus.com/bid/101057
• http://www.securitytracker.com/id/1039465
• https://bugzilla.mozilla.org/show_bug.cgi?id=1380597
• https://www.mozilla.org/security/advisories/mfsa2017-21/

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