Self-XSS in Mozilla Firefox - CVE-2017-7799

Vulnerability identifier: #VU7847

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear

CVE-ID: CVE-2017-7799

CWE-ID: CWE-79

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Mozilla

Affected software:
Mozilla Firefox

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

The weakness exists due to JavaScript in the about:webrtc page is not sanitized properly being assigned to innerHTML. A remote attacker can inject and execute malicious script in a victim's Web browser within the security context of the hosting Web site to steal the victim's cookie-based authentication credentials.

Update to version 55.0.

• https://www.mozilla.org/en-US/security/advisories/mfsa2017-18/