CVE-2019-1413 — Microsoft Edge Security Feature Bypass Vulnerability

Executive Summary

A security feature bypass vulnerability exists when Microsoft Edge improperly handles extension requests and fails to request host permission for all_urls. An attacker who successfully exploited this vulnerability could trick a browser into installing an extension without the user's consent. To exploit the vulnerability, the user must either browse to a malicious website or be redirected to it. In an email attack scenario, an attacker could send an email message in an attempt to convince the user to click a link to a malicious site, which then can download an extension for all_urls without the user's knowledge. In a web-based attack scenario, an attacker could host a specially crafted website designed to appear as a legitimate website to the user. However, the attacker would have no way to force the user to visit the specially crafted website. The attacker would have to convince the user to visit the specially crafted website, typically by way of an enticement in an email or instant message. The security update addresses the vulnerability by correcting how Microsoft Edge handles host permissions for adding extensions.

Overview

4.3

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Security Feature Bypass

Released Nov 12 2019

Last Updated Nov 12 2019

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.01047 — 0.59744 percentile

CVSS Vector

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

Temporal Score: 3.9

EPSS Score

0.01047

probability of exploitation in the next 30 days

0.59744 percentile - updated 2026-06-20

View on FIRST.org

Affected Products

16 affected products

Product	KB Article	Severity	Impact	Restart Required
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems	`4525236 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems	`4525236 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems	`4525241 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for ARM64-based Systems	`4525241 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems	`4525241 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems	`4525237 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems	`4525237 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems	`4525237 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems	`4523205 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems	`4523205 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems	`4523205 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for 32-bit Systems	`4524570 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for ARM64-based Systems	`4524570 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for x64-based Systems	`4524570 (Security Update)`	Important	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows Server 2016	`4525236 (Security Update)`	Low	Security Feature Bypass	Yes
Microsoft Edge (EdgeHTML-based) on Windows Server 2019	`4523205 (Security Update)`	Low	Security Feature Bypass	Yes

Patches

5 patches

Article	Type	Restart
`4525236`	Security Update	Yes
`4525241`	Security Update	Yes
`4525237`	Security Update	Yes
`4523205`	Security Update	Yes
`4524570`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Brxxn

References

MSRC Advisory MITRE NVD