CVE Vulnerability

CVE-2020-26956

In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

6.1 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://www.mozilla.org/security/advisories/mfsa2020-50/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-51/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-52/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1666300 Issue Tracking Permissions Required
Configurations

Configuration 1

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Information

Published : 2020-12-09 01:15

Updated : 2020-12-10 05:02

NVD link : CVE-2020-26956

Mitre link : CVE-2020-26956

Products Affected
No products.
CWE
CWE-79