VulnerabilityModified
CVE-2019-17020
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.
MEDIUM 6.5EPSS 1.15%
Does this matter?
Lower severity and a low EPSS score (1.15%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- EPSS
- 1.15% probability · 65th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-611
- Affected
- mozilla/firefox · canonical/ubuntu linux
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1597645Permissions Required
- https://usn.ubuntu.com/4234-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-01/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1597645Permissions Required
- https://usn.ubuntu.com/4234-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-01/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.