Vulnerability identifier: #VU45779

Vulnerability risk: Medium

CVSSv3.1: 6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-4089

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
HCL Notes
Client/Desktop applications / Office applications

Vendor: HCL Technologies

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied input within the "mailto" URI handler. A remote attacker can trick the victim to click on a specially crafted "mailto" link and attack to the email arbitrary file from the victim's system without any additional warning.

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

Vulnerable software versions

HCL Notes: 9.0.0 - 11.0.1

---

External links
http://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0080343

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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