Security advisories

CVE-2021-44748: Universal Cross-Site Scripting Vulnerability in F‑Secure Internet Security Browser for Android


Vulnerabilities in the browser of F‑Secure Internet Security for Android could allow execution of JavaScript.



FIX: A fix has been released in the automatic update channel since 18 February 2022. No user action is required if automatic update is enabled.

Affected products

  • F‑Secure Internet Security Browser for Android Version 18.5


  • All supported platforms for the affected products

More information

A vulnerability affecting F‑Secure Internet Security browser was discovered whereby browsers loads images automatically this vulnerability can be exploited remotely by an attacker to execute the JavaScript can be used to trigger universal cross-site scripting through the browser.

User inter­action is required prior to exploitation, such as entering a malicious website to trigger the vulnerability.

This issue was reported to F‑Secure through the Vulnerability Reward Program. No known exploit or attack has been seen in the wild.

Mitigating factors

User inter­action is required prior to exploitation.


F‑Secure Corporation would like to thank Kirtikumar Anandrao Ramchandani for bringing this issue to our attention.

Date Issued: 03-Mar-2022