Vulnerability Details CVE-2016-4537
The bcpowmod function in ext/bcmath/bcmath.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 accepts a negative integer for the scale argument, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted call.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.04
EPSS Ranking 88.1%
CVSS Severity
CVSS v3 Score 9.8
CVSS v2 Score 7.5