Stored XSS in WordPress comments functionality



Published: 2019-03-13
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-9787
CWE-ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
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WordPress
Web applications / CMS

Vendor WordPress.ORG

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Stored cross-site scripting

EUVDB-ID: #VU17981

Risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-9787

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

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 passed as comments. 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WordPress: 3.9 - 5.1

External links

http://wordpress.org/news/2019/03/wordpress-5-1-1-security-and-maintenance-release/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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



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