#VU52343 Code Injection in Firefox for Android - CVE-2021-29944

Vulnerability identifier: #VU52343

Vulnerability risk: Low

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

CVE-ID: CVE-2021-29944

CWE-ID: CWE-94

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 execute arbitrary HTML code.

The vulnerability exists due to improper input validation, when a webpage is viewed in Reader View. A remote attacker can inject and execute arbitrary HTML code in the victim's browser.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Firefox for Android: 80.1.2 - 86.1.1

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/

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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.