Stored XSS in Microsoft Office SharePoint

Published: 2019-06-28 | Updated: 2019-07-10
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-1134
CWE ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software Microsoft SharePoint Server Subscribe
Vendor Microsoft

Security Advisory

This security advisory describes one medium risk vulnerability.

UPDATED: 09.07.2019 Updated list of vulnerable software, changed information about patch availability.

1) Stored Cross-site scripting

Severity: Medium

CVSSv3: 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] [PCI]

CVE-ID: CVE-2019-1134

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('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 authenticated attacker can permanently inject 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Server: 2013, 2016, 2019

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1134

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.