Is CVE-2016-9902 in the CISA KEV catalog?

No. CVE-2016-9902 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-9902?

CVE-2016-9902 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2016-9902?

CVE-2016-9902 has an EPSS score of 1.33% (68th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-9902?

Upgrade firefox on debian unstable to 50.1.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2016-9902

HIGH

7.5

CVSS v3

NVD

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.

CWE-346

How to fix

Remediation Available

firefoxDebian

Fixed in:50.1.0-1CVE-2016-9902

firefoxUbuntu

Fixed in:50.1.0+build2-0ubuntu0.14.04.1USN-3155-1

Fixed in:50.1.0+build2-0ubuntu0.16.04.1USN-3155-1

DeveloperEditionWindows application

Affected:50.1Fixed in:50.1Mozilla

Affected:45.6.0Fixed in:45.6.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:50.1Fixed in:50.1Mozilla

Affected:45.6.0Fixed in:45.6.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

1.33%probability of exploitation in 30 days

68thpercentile

Moderate risk: more likely to be exploited than 68% of all known CVEs.

References

Patch1

bugzilla.mozilla.org

Vendor Advisory2

Third-Party Advisory5

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-25.