Two XSS vulnerabilities in Microsoft SharePoint

Published: 2018-06-12 21:02:18
Severity Low
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2018-8254
CVE-2018-8252
CVSSv3 5.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
5.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CWE ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software Microsoft SharePoint Server
Microsoft SharePoint Foundation
Microsoft Project Server
Vulnerable software versions Microsoft SharePoint Server 2016
Microsoft SharePoint Foundation 2013
Microsoft Project Server 2010 Service Pack 2
Vendor URL Microsoft

Security Advisory

1) Cross-site scripting

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in Microsoft SharePoint. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8254

2) Cross-site scripting

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in Microsoft SharePoint. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8252

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