CVE-2020-5540 Cross-site scripting in CyberMail

Medium 6.1 Published 25 Aug 2020 Updated 4 Aug 2024

Remote attackers can inject arbitrary scripts via crafted URLs in CyberMail, potentially leading to session hijacking or malicious actions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2020-5540?

CVE-2020-5540 is a medium-severity cross-site scripting vulnerability in CyberSolutions Inc. CyberMail, published on 25 Aug 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Cross-site scripting vulnerability in CyberMail Ver.6.x and Ver.7.x allows remote attackers to inject arbitrary script or HTML via a specially crafted URL.

Weakness: CWE-79

Which versions are affected by CVE-2020-5540?

It affects 1 product.

Products include Cybersolutions Cybermail.

How do I fix CVE-2020-5540?

No fix has been published for CVE-2020-5540 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-5540 being exploited?

There is no known exploitation of CVE-2020-5540 in the wild and no public exploit code.

Sources

Also known as GHSA-f7cr-gfx3-646g.