CRITICAL

CVE-2019-12966

CVSS v3

9.8

CRITICAL

EPSS Score

2.4 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2019-12966 yet.

Full record on NVD

Description

FeHelper through 2019-06-19 allows arbitrary code execution during a JSON format operation, as demonstrated by the {"a":(function(){confirm(1)})()} input.

Technical details

Published: 2019-06-26

Frequently asked questions

What is CVE-2019-12966?

FeHelper through 2019-06-19 allows arbitrary code execution during a JSON format operation, as demonstrated by the {"a":(function(){confirm(1)})()} input.

Is CVE-2019-12966 actively exploited?

Active exploitation of CVE-2019-12966 has not been confirmed. Its EPSS score was 2.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-12966?

CVE-2019-12966 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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