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Internet Explorer CVE-2018-8470

MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2018-09-13 secure@microsoft.com
6.1
CVSS 3.0 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required.

Exploit ScenarioDerived

A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 3.3% exploitation probability (EPSS)

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AnalysisAI

A security feature bypass vulnerability exists in Internet Explorer due to how scripts are handled that allows a universal cross-site scripting (UXSS) condition, aka "Internet Explorer Security. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. A security feature bypass vulnerability exists in Internet Explorer due to how scripts are handled that allows a universal cross-site scripting (UXSS) condition, aka "Internet Explorer Security Feature Bypass Vulnerability." This affects Internet Explorer 11. Affected products include: Microsoft Internet Explorer.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.1 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

DescriptionNVD

A security feature bypass vulnerability exists in Internet Explorer due to how scripts are handled that allows a universal cross-site scripting (UXSS) condition, aka "Internet Explorer Security Feature Bypass Vulnerability." This affects Internet Explorer 11.

Threat Intelligence Overview

EPSS Score
3.3%
Top 13% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 3.3%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +3
CVSS: +30
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Affected Products (CPE)NVD

cpe:2.3:a:microsoft:internet_explorer:11:*:*:*:*:*:*:*
CVE-2012-1876 CRITICAL POC
9.3 Jun 12

Microsoft Internet Explorer 6 through 9, and 10 Consumer Preview, does not properly handle objects in memory, which allo

CVE-2014-0307 CRITICAL POC
9.3 Mar 12

Use-after-free vulnerability in Microsoft Internet Explorer 9 allows remote attackers to execute arbitrary code or cause

CVE-2013-0025 CRITICAL POC
9.3 Feb 13

Use-after-free vulnerability in Microsoft Internet Explorer 8 allows remote attackers to execute arbitrary code via a cr

CVE-2012-1875 CRITICAL POC
9.3 Jun 12

Microsoft Internet Explorer 8 does not properly handle objects in memory, which allows remote attackers to execute arbit

CVE-2013-3205 CRITICAL POC
9.3 Sep 11

Microsoft Internet Explorer 6 through 8 allows remote attackers to execute arbitrary code or cause a denial of service (

CVE-2013-3184 CRITICAL POC
9.3 Aug 14

Microsoft Internet Explorer 7 through 10 allows remote attackers to execute arbitrary code or cause a denial of service

CVE-2016-3213 HIGH POC
8.8 Jun 16

The Web Proxy Auto Discovery (WPAD) protocol implementation in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and

CVE-2014-1764 CRITICAL POC
10.0 Apr 27

Microsoft Internet Explorer 7 through 11 allows remote attackers to execute arbitrary code and bypass a sandbox protecti

CVE-2017-8636 HIGH POC
7.5 Aug 08

Microsoft browsers in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Serve

CVE-2014-0282 CRITICAL POC
9.3 Jun 11

Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service

CVE-2016-7287 HIGH POC
7.5 Dec 20

The scripting engines in Microsoft Internet Explorer 11 and Microsoft Edge allow remote attackers to execute arbitrary c

CVE-2016-0199 HIGH POC
8.8 Jun 16

Microsoft Internet Explorer 9 through 11 allows remote attackers to execute arbitrary code or cause a denial of service

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