Cross-site scripting in Ghost



Published: 2021-05-04
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-29484
CWE-ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Ghost
Web applications / CMS

Vendor Ghost

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Cross-site scripting

EUVDB-ID: #VU52841

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-29484

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 in Theme Preview. 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

Ghost: 4.0.0 - 4.3.2

CPE2.3 External links

http://www.npmjs.com/package/ghost
http://forum.ghost.org/t/critical-security-update-available-for-ghost-4-x/22290
http://github.com/TryGhost/Ghost/security/advisories/GHSA-9fgx-q25h-jxrg


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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