vulnerability
Ubuntu: (Multiple Advisories) (CVE-2020-26956): Firefox vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:N/C:N/I:P/A:N) | Nov 18, 2020 | Nov 19, 2020 | Mar 27, 2026 |
Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
Nov 18, 2020
Added
Nov 19, 2020
Modified
Mar 27, 2026
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.
Solutions
ubuntu-upgrade-firefoxubuntu-upgrade-thunderbird
References
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