vulnerability
MFSA2021-15 Firefox: Security Vulnerabilities fixed in Firefox ESR 78.10 (CVE-2021-23995)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:H/Au:N/C:P/I:P/A:P) | Apr 19, 2021 | Apr 20, 2021 | Aug 11, 2025 |
Severity
5
CVSS
(AV:N/AC:H/Au:N/C:P/I:P/A:P)
Published
Apr 19, 2021
Added
Apr 20, 2021
Modified
Aug 11, 2025
Description
When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
Solution
mozilla-firefox-esr-upgrade-78_10
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