CVE-2018-18499
Mozilla: Same-origin policy violation using meta refresh and performance.getEntries to steal cross-origin URLs
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · September 5, 2018
Updated · January 9, 2026
Description
A same-origin policy violation allowing the theft of cross-origin URL entries when using a meta http-equiv="refresh" on a page to cause a redirection to another site using performance.getEntries(). This is a same-origin policy violation and could allow for data theft. This vulnerability affects Firefox < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 6.5CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE-829 · Inclusion of Functionality from Untrusted Control Sphere