Multiple vulnerabilities in Microsoft SharePoint Server

Published: 2018-09-13 18:33:00
Severity Medium
Patch available YES
Number of vulnerabilities 3
CVE ID CVE-2018-8426
CVE-2018-8428
CVE-2018-8431
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]
5.6 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/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 Not available
Vulnerable software Microsoft SharePoint Server
Vulnerable software versions Microsoft SharePoint Server 2010
Microsoft SharePoint Server 2013
Microsoft SharePoint Server 2016
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. 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-2018-8426

2) Stored 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. 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-2018-8428

3) 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. 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-2018-8431

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