Vulnerability identifier: #VU53712

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-29963

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Firefox for Android
Mobile applications / Apps for mobile phones

Vendor: Mozilla

Description

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

The vulnerability exists due to address bar search suggestions in private browsing mode is re-using session data from normal mode. A remote website can identify the user using the suggested session data.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Firefox for Android: 80.1.2 - 88.1.4

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External links
http://www.mozilla.org/en-US/security/advisories/mfsa2021-23/

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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.