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Red Hat: CVE-2020-26956: CVE-2020-26956 Mozilla: XSS through paste (manual and clipboard API) (Multiple Advisories)

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Red Hat: CVE-2020-26956: CVE-2020-26956 Mozilla: XSS through paste (manual and clipboard API) (Multiple Advisories)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
11/30/2020
Created
12/02/2020
Added
12/01/2020
Modified
12/15/2023

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.

Solution(s)

  • redhat-upgrade-firefox
  • redhat-upgrade-firefox-debuginfo
  • redhat-upgrade-firefox-debugsource
  • redhat-upgrade-thunderbird
  • redhat-upgrade-thunderbird-debuginfo
  • redhat-upgrade-thunderbird-debugsource

References

  • CVE-2020-26956
  • RHSA-2020:5231
  • RHSA-2020:5232
  • RHSA-2020:5233
  • RHSA-2020:5234
  • RHSA-2020:5235
  • RHSA-2020:5236
  • RHSA-2020:5237
  • RHSA-2020:5239
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