Cross-site scripting in sanitize a Ruby HTML and CSS sanitizer



Published: 2020-06-22
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-4054
CWE-ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
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sanitize
Web applications / Modules and components for CMS

Vendor Ryan Grove

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Cross-site scripting

EUVDB-ID: #VU29195

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2020-4054

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 a "<math>" or "<svg>" element. 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 update from vendor's website.

Vulnerable software versions

sanitize: 3.0.0 - 5.2.0


CPE2.3 External links

http://github.com/rgrove/sanitize/commit/a11498de9e283cd457b35ee252983662f7452aa9
http://github.com/rgrove/sanitize/releases/tag/v5.2.1
http://github.com/rgrove/sanitize/security/advisories/GHSA-p4x4-rw2p-8j8m

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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