Information disclosure in Mozilla Firefox for iOS

Published: 2020-06-26
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-12414
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Firefox for iOS
Mobile applications / Apps for mobile phones

Vendor Mozilla

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU29313

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-12414

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the IndexedDB should be cleared when leaving private browsing mode and it is not, the API for "WKWebViewConfiguration" was being used incorrectly and requires the private instance of this object be deleted when leaving private mode.


Install updates from vendor's website.

Vulnerable software versions

Firefox for iOS: 8.0 - 26.0

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to perform certain actions on the device.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.