#VU23954 Cross-site scripting in Postie - CVE-2019-20204

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Main Vulnerability Database Vulnerabilities #VU23954

#VU23954 Cross-site scripting in Postie - CVE-2019-20204

Published: January 6, 2020 / Updated: June 17, 2021


Vulnerability identifier: #VU23954
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear
CVE-ID: CVE-2019-20204
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vulnerable software:
Postie
Software vendor:
Wayne Allen

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 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.

PoC:

Use Polyglot JavaScript syntax with crafted SVG, as follows:

jaVasCript:/*--></title></style></textarea></script></xmp><svg/onload='+/"/+/onmouseover=1/+/[*/[]/+alert(1)//'>


Remediation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability..

External links