CVEvulnerability
CVE-2019-9803
7.4 HIGH
Official page ↗
- Status
- Modified
- Published
- 2019-04-26
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 7.4 HIGH — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:N
- Weaknesses
- CWE-346
Description
The Upgrade-Insecure-Requests (UIR) specification states that if UIR is enabled through Content Security Policy (CSP), navigation to a same-origin URL must be upgraded to HTTPS. Firefox will incorrectly navigate to an HTTP URL rather than perform the security upgrade requested by the CSP in some circumstances, allowing for potential man-in-the-middle attacks on the linked resources. This vulnerability affects Firefox < 66.
Affected configurations
• mozilla firefox (< 66.0)
Related
Weakness · CWE (1)
- CWE-346 Origin Validation Error weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1437009 Issue Tracking, Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1515863 Issue Tracking, Permissions Required, Vendor Advisory
- https://w3c.github.io/webappsec-upgrade-insecure-requests/ Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-07/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1437009 Issue Tracking, Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1515863 Issue Tracking, Permissions Required, Vendor Advisory
- https://w3c.github.io/webappsec-upgrade-insecure-requests/ Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-07/ Vendor Advisory