CVE-2019-3670Public exploitNetwork attack vector

Code execution via unsanitized site-report URL

Published Feb 24, 2020 · Updated Aug 4, 2024

Cross-site scripting in McAfee WebAdvisor Chrome before 8.0.34745 and Firefox before 8.0.0.34239 allows remote attackers to execute code. The site_report.html page trims the url query value, embeds it in a localization string, and passes the result to jQuery.append without neutralizing HTML. A malicious website must induce two clicks to add a crafted whitelist entry and open UIHost.exe, where injected script can write privileged Windows registry values and launch commands.

CVSS severity8.0
High
EPSS probability1.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in McAfee WebAdvisor Chrome before 8.0.34745 and Firefox before 8.0.0.34239 allows remote attackers to execute code. The site_report.html page trims the url query value, embeds it in a localization string, and passes the result to jQuery.append without neutralizing HTML. A malicious website must induce two clicks to add a crafted whitelist entry and open UIHost.exe, where injected script can write privileged Windows registry values and launch commands.

The record

CVE
CVE-2019-3670
Published
Feb 24, 2020
Updated
Aug 4, 2024
Vendor
McAfee
Product
McAfee WebAdvisor
Classifications
CWE-79, T1203, T1112
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 2020CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=8.0.0.x <8.0.0.34239
  2. Affected versionversion=8.0.x <8.0.34745

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

McAfee · McAfee WebAdvisorversion=8.0.0.x <8.0.0.34239; version=8.0.x <8.0.34745

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
8.0TrellixCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution
T1112Modify Registry

Public exploit references

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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