CVE-2018-5134 : WebExtensions may use "view-source:" URLs to view local "file:" URL content, as well as content stored in "about:cache",

WebExtensions may use "view-source:" URLs to view local "file:" URL content, as well as content stored in "about:cache", bypassing restrictions that only allow WebExtensions to view specific content. This vulnerability affects Firefox < 59.

Published 2018-06-11 21:29:14

Updated 2018-08-08 18:35:20

Source Mozilla Corporation

View at NVD, CVE.org

Vulnerability category: Information leak

Exploit prediction scoring system (EPSS) score for CVE-2018-5134

EPSS FAQ

0.25%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 62 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2018-5134

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:P/I:N/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
7.5	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

References for CVE-2018-5134

https://usn.ubuntu.com/3596-1/

USN-3596-1: Firefox vulnerabilities | Ubuntu security notices
Third Party Advisory

CVEs referencing this url
http://www.securitytracker.com/id/1040514

Mozilla Firefox Multiple Bugs Let Remote Users Spoof URLs, Bypass Security Restrictions, Deny Service, Obtain Potentially Sensitive Information, and Execute Arbitrary Code - SecurityTracker
Third Party Advisory;VDB Entry

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2018-06/

Security vulnerabilities fixed in Firefox 59 — Mozilla
Vendor Advisory

CVEs referencing this url
https://bugzilla.mozilla.org/show_bug.cgi?id=1429379

1429379 - (CVE-2018-5134) Web extensions can open any url using view-source:
Permissions Required
http://www.securityfocus.com/bid/103386

Mozilla Firefox MFSA2018-06 Multiple Security Vulnerabilities
Third Party Advisory;VDB Entry

CVEs referencing this url

Products affected by CVE-2018-5134

Mozilla » Firefox
Versions before (<) 59.0
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Matching versions

Vulnerability Details : CVE-2018-5134

Exploit prediction scoring system (EPSS) score for CVE-2018-5134

CVSS scores for CVE-2018-5134

CWE ids for CVE-2018-5134

References for CVE-2018-5134

Products affected by CVE-2018-5134