Vulnerability identifier: #VU10986

Vulnerability risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-5143

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers

Vendor: Mozilla

Description
The vulnerability allows a remote attacker to conduct self-XSS attack.

The weakness exists due to URLs using javascript: have the protocol removed when pasted into the addressbar to protect users from cross-site scripting (XSS) attacks. A remote attacker can supply URL with embedded tab into addressbar and become socially engineered to run an XSS attack against themselves.

Mitigation
Update to version 59.0.

Vulnerable software versions

Mozilla Firefox: 58.0

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External links
http://www.mozilla.org/en-US/security/advisories/mfsa2018-06/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.