CVE-2019-17020

MEDIUM 6.5CVE-2019-17020 · Published 08/01/2020 · updated 17/06/2026

In short

CVE-2019-17020 is a MEDIUM (CVSS 6.5) vulnerability affecting firefox (mozilla).
Chance of exploitation in the next 30 days (EPSS): 1.1%, higher than 66.8% of all vulnerabilities.
Fix: update to 72.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 72.0`	`72.0`

Description

If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL sheet e.g. includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to the XML document. This vulnerability affects Firefox < 72.

References

bugzilla.mozilla.org/show_bug.cgi · Permissions Required
usn.ubuntu.com/4234-1 · Third Party Advisory
mozilla.org/security/advisories/mfsa2020-01 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

< 72.0

72.0

Description

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