#VU54682 Security restrictions bypass in Firefox for Android - CVE-2021-29973

Vulnerability identifier: #VU54682

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-29973

CWE-ID: CWE-264

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 sensitive information.

The vulnerability exists due to password autofill is enabled without user interaction on insecure websites on Firefox for Android. A remote attacker can trick the victim to visit an attacker-controlled website and obtain victim's credentials.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Firefox for Android: 80.1.2 - 89.1.1

---

External links
https://www.mozilla.org/en-US/security/advisories/mfsa2021-28/

---

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.