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Vulnerability details: VCID-vnuz-wp96-pqgt
Vulnerability ID VCID-vnuz-wp96-pqgt
Aliases CVE-2017-5389
Summary WebExtensions could use the mozAddonManager API by modifying the CSP headers on sites with the appropriate permissions and then using host requests to redirect script loads to a malicious site. This allows a malicious extension to then install additional extensions without explicit user permission.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
System Score Found at
epss 0.00374 https://api.first.org/data/v1/epss?cve=CVE-2017-5389
epss 0.00374 https://api.first.org/data/v1/epss?cve=CVE-2017-5389
epss 0.00374 https://api.first.org/data/v1/epss?cve=CVE-2017-5389
epss 0.00374 https://api.first.org/data/v1/epss?cve=CVE-2017-5389
epss 0.00374 https://api.first.org/data/v1/epss?cve=CVE-2017-5389
epss 0.00374 https://api.first.org/data/v1/epss?cve=CVE-2017-5389
epss 0.00374 https://api.first.org/data/v1/epss?cve=CVE-2017-5389
epss 0.00374 https://api.first.org/data/v1/epss?cve=CVE-2017-5389
epss 0.00374 https://api.first.org/data/v1/epss?cve=CVE-2017-5389
cvssv2 5.8 https://nvd.nist.gov/vuln/detail/CVE-2017-5389
cvssv3 6.1 https://nvd.nist.gov/vuln/detail/CVE-2017-5389
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-2017-5389
https://bugzilla.mozilla.org/show_bug.cgi?id=1308688
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-2017-5389 https://nvd.nist.gov/vuln/detail/CVE-2017-5389
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:N/AC:M/Au:N/C:P/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2017-5389
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:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2017-5389
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 0.58975
EPSS Score 0.00374
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:16:47.533132+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2017/mfsa2017-01.yml 38.0.0