CVE-2018-8159

Microsoft Exchange Elevation of Privilege Vulnerability

CVE-2018-8159 is fixed in 4 products on 1 platform, first by KB4092041, released May 8, 2018. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
n/a
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0351
89th percentile

<p>An elevation of privilege vulnerability exists when Microsoft Exchange Outlook Web Access (OWA) fails to properly handle web requests. An attacker who successfully exploited this vulnerability could perform script/content injection attacks and attempt to trick the user into disclosing sensitive information.</p> <p>To exploit the vulnerability, an attacker could send a specially crafted email message containing a specific malicious script. The user would have to apply a highlight to the script for it to be activated.</p> <p>The security update addresses the vulnerability by correcting how Microsoft Exchange validates web requests.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Microsoft Exchange Server 2013 Cumulative Update 19 KB4092041 May 8, 2018
Microsoft Exchange Server 2013 Cumulative Update 20 KB4092041 May 8, 2018
Microsoft Exchange Server 2016 Cumulative Update 8 KB4092041 May 8, 2018
Microsoft Exchange Server 2016 Cumulative Update 9 KB4092041 May 8, 2018

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