CVE-2019-11720: XSS
First published: Tue Jul 09 2019(Updated: )
Some unicode characters are incorrectly treated as whitespace during the parsing of web content instead of triggering parsing errors. This allows malicious code to then be processed, evading cross-site scripting (XSS) filtering.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox | <68 | 68 |
| <68 | 68 | |
| Mozilla Firefox | <68.0 | |
| openSUSE Leap | =15.0 | |
| openSUSE Leap | =15.1 | |
| <68 | 68 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1556230
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-21/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-21/#CVE-2019-11727
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-28/
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
- https://security.gentoo.org/glsa/201908-12
- https://www.mozilla.org/security/advisories/mfsa2019-21/
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2019-11720?
CVE-2019-11720 is a vulnerability that allows malicious code to be processed in web content, evading cross-site scripting (XSS) filtering.
Which software is affected by CVE-2019-11720?
CVE-2019-11720 affects Mozilla Firefox versions up to and excluding version 68, as well as Mozilla Thunderbird, openSUSE Leap 15.0, and openSUSE Leap 15.1.
What is the severity of CVE-2019-11720?
The severity of CVE-2019-11720 is medium, with a CVSS score of 6.1.
How does CVE-2019-11720 work?
CVE-2019-11720 incorrectly treats some unicode characters as whitespace during web content parsing, allowing malicious code to evade XSS filtering.
How can I fix CVE-2019-11720?
To fix CVE-2019-11720, update your Mozilla Firefox or Mozilla Thunderbird to version 68 or above.
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