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Vulnerability details: VCID-yq19-nbqk-aaan
Vulnerability ID VCID-yq19-nbqk-aaan
Aliases CVE-2018-5105
Summary WebExtensions can bypass user prompts to first save and then open an arbitrarily downloaded file. This can result in an executable file running with local user privileges without explicit user consent. This vulnerability affects Firefox < 58.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (0)
There are no known CWE.
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-5105.html
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epss 0.00081 https://api.first.org/data/v1/epss?cve=CVE-2018-5105
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epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2018-5105
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epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2018-5105
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epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2018-5105
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2018-5105
epss 0.00182 https://api.first.org/data/v1/epss?cve=CVE-2018-5105
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5105
cvssv2 7.2 https://nvd.nist.gov/vuln/detail/CVE-2018-5105
cvssv3 7.8 https://nvd.nist.gov/vuln/detail/CVE-2018-5105
generic_textual Low https://ubuntu.com/security/notices/USN-3544-1
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-02
generic_textual Low https://www.mozilla.org/en-US/security/advisories/mfsa2018-02/
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-5105.html
https://api.first.org/data/v1/epss?cve=CVE-2018-5105
https://bugzilla.mozilla.org/show_bug.cgi?id=1390882
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5105
https://ubuntu.com/security/notices/USN-3544-1
https://usn.ubuntu.com/3544-1/
https://www.mozilla.org/en-US/security/advisories/mfsa2018-02/
https://www.mozilla.org/security/advisories/mfsa2018-02/
http://www.securityfocus.com/bid/102786
http://www.securitytracker.com/id/1040270
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:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
CVE-2018-5105 https://nvd.nist.gov/vuln/detail/CVE-2018-5105
mfsa2018-02 https://www.mozilla.org/en-US/security/advisories/mfsa2018-02
No exploits are available.
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C Found at https://nvd.nist.gov/vuln/detail/CVE-2018-5105
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:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-5105
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 0.24205
EPSS Score 0.00078
Published At May 12, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.