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MFSA2021-05 Thunderbird: Security Vulnerabilities fixed in Thunderbird 78.7 (CVE-2021-23953)

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MFSA2021-05 Thunderbird: Security Vulnerabilities fixed in Thunderbird 78.7 (CVE-2021-23953)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
01/26/2021
Created
01/28/2021
Added
01/27/2021
Modified
03/05/2021

Description

If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

Solution(s)

  • mozilla-thunderbird-upgrade-78_7

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