CVE-2020-26956

medium

Description

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.

References

https://www.mozilla.org/security/advisories/mfsa2020-52/

https://www.mozilla.org/security/advisories/mfsa2020-51/

https://www.mozilla.org/security/advisories/mfsa2020-50/

https://bugzilla.mozilla.org/show_bug.cgi?id=1666300

Details

Source: Mitre, NVD

Published: 2020-12-09

Updated: 2020-12-10

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N