CVE-2018-5142
This vulnerability affects Firefox < 59.
Does this matter?
Lower severity and a low EPSS score (1.19%). Track it; it rarely justifies an emergency change on its own.
Description
If Media Capture and Streams API permission is requested from documents with "data:" or "blob:" URLs, the permission notifications do not properly display the originating domain. The notification states "Unknown protocol" as the requestee, leading to user confusion about which site is asking for this permission. This vulnerability affects Firefox < 59.
- CVSS 3.0
- 5.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 1.19% probability · 68th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- mozilla/firefox · canonical/ubuntu linux
- Source
- security@mozilla.org
EPSS 1.2% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- 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=1366357Permissions Required
- 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=1366357Permissions Required
- https://usn.ubuntu.com/3596-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-06/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.