Vulnerability identifier: #VU48729

Vulnerability risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-29133

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Coremail
Client/Desktop applications / Other client software

Vendor: Guangdong Yingshi Computer Technology Co.

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 jsp/upload.jsp. A remote authenticated attacker can use the signImgFile parameter of uploading personal signature, 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
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Coremail: 5.0

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External links
http://github.com/fa1c0n1/fa1c0n-vim/blob/master/temp/core_tmp.md
http://www.coremail.cn/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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