PT-2020-16573 · Mozilla+6 · Firefox+8
Moti Harmats
·
Published
2020-11-17
·
Updated
2024-12-12
·
CVE-2020-26958
CVSS v3.1
6.1
Medium
| Vector | AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 83
Firefox ESR versions prior to 78.5
Thunderbird versions prior to 78.5
Description
The issue arises when Firefox fails to block the execution of scripts with incorrect MIME types after the response is intercepted and cached through a ServiceWorker. This can lead to a cross-site script inclusion vulnerability or a Content Security Policy bypass.
Recommendations
For Firefox versions prior to 83, update to version 83 or later.
For Firefox ESR versions prior to 78.5, update to version 78.5 or later.
For Thunderbird versions prior to 78.5, update to version 78.5 or later.
Exploit
Fix
XSS
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Firefox
Firefox Esr
Linuxmint
Red Hat
Suse
Thunderbird
Ubuntu