CVE-2017-7820

2018-06-1121:00:00

mozilla

www.cve.org

AI Score

6.5

Confidence

Low

EPSS

0.005

Percentile

76.1%

JSON

The “instanceof” operator can bypass the Xray wrapper mechanism. When called on web content from the browser itself or an extension the web content can provide its own result for that operator, possibly tricking the browser or extension into mishandling the element. This vulnerability affects Firefox < 56.

CNA Affected

[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "56",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]