CVE-2018-8448

Microsoft Exchange Server Elevation of Privilege Vulnerability

CVE-2018-8448 is fixed in 2 products on 1 platform, first by KB4459266, released October 9, 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
0.0317
88th 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 malicious link to a user. Alternatively, an attacker could use a chat client to social engineer a user into clicking the malicious link.</p> <p>The security update addresses the vulnerability by correcting how Microsoft Exchange validates web requests.</p> <p>Note: In order to exploit this vulnerability, a user must click a maliciously crafted link from an attacker.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Microsoft Exchange Server 2013 Cumulative Update 21 KB4459266 Oct 9, 2018
Microsoft Exchange Server 2016 Cumulative Update 10 KB4459266 Oct 9, 2018