CVE-2020-26951

2020-12-0900:19:43

mozilla

www.cve.org

6.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

36.8%

JSON

A parsing and event loading mismatch in Firefox’s SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CNA Affected

[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "affected",
        "version": "< 83"
      }
    ]
  },
  {
    "product": "Firefox ESR",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "affected",
        "version": "< 78.5"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "affected",
        "version": "< 78.5"
      }
    ]
  }
]