Stored cross-site scripting in Jenkins Markdown Formatter plugin



Published: 2021-05-26
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-21660
CWE-ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Markdown Formatter
Web applications / Modules and components for CMS

Vendor Jenkins

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Stored cross-site scripting

EUVDB-ID: #VU53591

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-21660

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. A remote authenticated attacker can 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

Markdown Formatter: 0.1.0 - 0.1.0

CPE2.3 External links

http://www.jenkins.io/security/advisory/2021-05-25/#SECURITY-2198
http://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-21660
http://www.openwall.com/lists/oss-security/2021/05/25/3


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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