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Vulnerability details: VCID-4z19-eyh7-9yf4
Vulnerability ID VCID-4z19-eyh7-9yf4
Aliases CVE-2017-5387
Summary The existence of a specifically requested local file can be found due to the double firing of the onerror when the source attribute on a <track> tag refers to a file that does not exist if the source page is loaded locally.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-538 Insertion of Sensitive Information into Externally-Accessible File or Directory
System Score Found at
epss 0.00126 https://api.first.org/data/v1/epss?cve=CVE-2017-5387
epss 0.00126 https://api.first.org/data/v1/epss?cve=CVE-2017-5387
epss 0.00126 https://api.first.org/data/v1/epss?cve=CVE-2017-5387
epss 0.00126 https://api.first.org/data/v1/epss?cve=CVE-2017-5387
epss 0.00126 https://api.first.org/data/v1/epss?cve=CVE-2017-5387
epss 0.00126 https://api.first.org/data/v1/epss?cve=CVE-2017-5387
epss 0.00126 https://api.first.org/data/v1/epss?cve=CVE-2017-5387
epss 0.00126 https://api.first.org/data/v1/epss?cve=CVE-2017-5387
epss 0.00126 https://api.first.org/data/v1/epss?cve=CVE-2017-5387
cvssv2 2.1 https://nvd.nist.gov/vuln/detail/CVE-2017-5387
cvssv3 3.3 https://nvd.nist.gov/vuln/detail/CVE-2017-5387
archlinux Critical https://security.archlinux.org/AVG-157
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2017-01
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2017-5387
https://bugzilla.mozilla.org/show_bug.cgi?id=1295023
https://www.mozilla.org/security/advisories/mfsa2017-01/
http://www.securityfocus.com/bid/95763
http://www.securitytracker.com/id/1037693
ASA-201701-39 https://security.archlinux.org/ASA-201701-39
AVG-157 https://security.archlinux.org/AVG-157
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
CVE-2017-5387 https://nvd.nist.gov/vuln/detail/CVE-2017-5387
mfsa2017-01 https://www.mozilla.org/en-US/security/advisories/mfsa2017-01
USN-3175-1 https://usn.ubuntu.com/3175-1/
No exploits are available.
Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2017-5387
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2017-5387
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.31895
EPSS Score 0.00126
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:16:47.732657+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2017/mfsa2017-01.yml 38.0.0