CVE-2021-44748Network attack vector

Cross-origin script execution via automatic image loading

Published Mar 6, 2022 · Updated Aug 4, 2024

Universal cross-site scripting in F-Secure SAFE Browser for Android 18.5 allows remote attackers to execute JavaScript through image loading. The browser's image-loading path automatically loads images from visited content and permits JavaScript to execute in a universal cross-site context. Exploitation requires the user to enter a malicious website, which grants the script cross-origin execution in the browser.

CVSS severity6.1
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Universal cross-site scripting in F-Secure SAFE Browser for Android 18.5 allows remote attackers to execute JavaScript through image loading. The browser's image-loading path automatically loads images from visited content and permits JavaScript to execute in a universal cross-site context. Exploitation requires the user to enter a malicious website, which grants the script cross-origin execution in the browser.

The record

CVE
CVE-2021-44748
Published
Mar 6, 2022
Updated
Aug 4, 2024
Vendor
F-Secure
Product
F-Secure SAFE Browser for Android
Classifications
CWE-79, T1189
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 6, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <18.5x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

F-Secure · F-Secure SAFE Browser for Androidversion=unspecified <18.5x

Published CVSS scores

5.5F-SecureCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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