CVE-2018-5143

URLs using "javascript:" have the protocol removed when pasted into the addressbar to protect users from cross-site scripting (XSS) attacks, but if a tab character is embedded in the "javascript:" URL the protocol is not removed and the script will execute. This could allow users to be socially engineered to run an XSS attack against themselves. This vulnerability affects Firefox < 59.

• CWE-79

• http://www.securityfocus.com/bid/103386Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1040514Third Party Advisory, VDB Entry
• https://bugzilla.mozilla.org/show_bug.cgi?id=1422643Issue Tracking, Vendor Advisory
• https://usn.ubuntu.com/3596-1/Third Party Advisory
• https://www.mozilla.org/security/advisories/mfsa2018-06/Vendor Advisory
• http://www.securityfocus.com/bid/103386Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1040514Third Party Advisory, VDB Entry
• https://bugzilla.mozilla.org/show_bug.cgi?id=1422643Issue Tracking, Vendor Advisory
• https://usn.ubuntu.com/3596-1/Third Party Advisory
• https://www.mozilla.org/security/advisories/mfsa2018-06/Vendor Advisory

Published

Jun 11, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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