What’s Vulnerable › Vulnerabilities

CVE-2016-9902

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-06-11 · updated 2026-06-17
• Weakness: CWE-346

Description

The Pocket toolbar button, once activated, listens for events fired from it's own pages but does not verify the origin of incoming events. This allows content from other origins to fire events and inject content and commands into the Pocket context. Note: this issue does not affect users with e10s enabled. This vulnerability affects Firefox ESR < 45.6 and Firefox < 50.1.

Affected products

• Mozilla Firefox: before 45.6.0; before 50.1 — fixed in 45.6.0, 50.1
• RedHat Enterprise Linux Desktop: 5.0, 6.0, 7.0
• RedHat Enterprise Linux Server: 5.0, 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.3, 7.4
• RedHat Enterprise Linux Server Eus: 7.3, 7.4, 7.5
• RedHat Enterprise Linux Workstation: 5.0, 6.0, 7.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 45.6.0, 50.1. Check the vendor advisory for mitigations.

References

• http://rhn.redhat.com/errata/RHSA-2016-2946.html
• http://rhn.redhat.com/errata/RHSA-2016-2973.html
• http://www.securityfocus.com/bid/94885
• http://www.securitytracker.com/id/1037461
• https://bugzilla.mozilla.org/show_bug.cgi?id=1320039
• https://security.gentoo.org/glsa/201701-15
• https://www.mozilla.org/security/advisories/mfsa2016-94/
• https://www.mozilla.org/security/advisories/mfsa2016-95/
• http://rhn.redhat.com/errata/RHSA-2016-2946.html
• http://rhn.redhat.com/errata/RHSA-2016-2973.html
• http://www.securityfocus.com/bid/94885
• http://www.securitytracker.com/id/1037461

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