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CVE-2020-16873

Xamarin.Forms Spoofing Vulnerability

MEDIUM
4.7
CVSS Score
Published: September 11, 2020 at 05:08 PM UTC
Updated: June 17, 2026 at 02:58 AM UTC
1 product affected across 1 vendorXamarin.forms· also runs on 1 platform

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Severity
MEDIUM4.7
Exploit prediction
EPSS 4%

Description

<p>A spoofing vulnerability manifests in Microsoft Xamarin.Forms due to the default settings on Android WebView version prior to 83.0.4103.106. This vulnerability could allow an attacker to execute arbitrary Javascript code on a target system.</p> <p>For the attack to be successful, the targeted user would need to browse to a malicious website or a website serving the malicious code through Xamarin.Forms.</p> <p>The security update addresses this vulnerability by preventing the malicious Javascript from running in the WebView.</p>

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Xamarin.forms· Microsoft
60%
83.0.0 ≤ v < publication83.0.0
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
google-chrome (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16873

CVSS

4.7MEDIUMmicrosoft
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-1188

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