CVE-2020-26951

CVE Details

Release Date:	2020-12-09
Impact:	None	What is this?

Description

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.

See more information about CVE-2020-26951 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	6.1
Vector String:	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Version:	3.0
Attack Vector:	Network
Attack Complexity:	Low
Privileges Required:	None
User Interaction:	Required
Scope:	Changed
Confidentiality Impact:	Low
Integrity Impact:	Low
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (firefox)	ELSA-2020-5257	2020-12-01
Oracle Linux version 6 (thunderbird)	ELSA-2020-5238	2020-12-01
Oracle Linux version 7 (firefox)	ELSA-2020-5239	2020-12-01
Oracle Linux version 7 (thunderbird)	ELSA-2020-5235	2020-12-01
Oracle Linux version 8 (firefox)	ELSA-2020-5237	2020-12-01
Oracle Linux version 8 (thunderbird)	ELSA-2020-5236	2020-12-01