vulnerability
Debian: CVE-2020-26956: firefox-esr, thunderbird -- security update
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:N/C:N/I:P/A:N) | Nov 20, 2020 | Nov 20, 2020 | Aug 15, 2025 |
Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
Nov 20, 2020
Added
Nov 20, 2020
Modified
Aug 15, 2025
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
debian-upgrade-firefox-esrdebian-upgrade-thunderbird
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