CVE-2019-12966

9.8 criticalEPSS 2.4%

Critical (9.8) in fehelper project fehelper. EPSS 2.4% chance of exploitation in the next 30 days.

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

Severity

CVSS 3.0

9.8 critical

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

EPSS: 2.4% chance of exploitation in the next 30 days; higher than 84% of CVEs (scores of 2026-10-31)
CWE: CWE-74
Published: 2019-06-26
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

fehelper_project:fehelper

References

https://github.com/zxlie/FeHelper/issues/63
https://github.com/zxlie/FeHelper/issues/63

Check your stack JSON