CVE-2021-4255 ctrlo lenio contractor.tt cross site scripting

Low 3.5 Published 18 Dec 2022 Updated 15 Apr 2025

Remote attackers can inject malicious scripts via the contractor name field in the Lenio web application, potentially compromising user sessions.

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

What is CVE-2021-4255?

CVE-2021-4255 is a low-severity cross-site scripting vulnerability in ctrlo lenio, published on 18 Dec 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A vulnerability was found in ctrlo lenio and classified as problematic. Affected by this issue is some unknown functionality of the file views/contractor.tt. The manipulation of the argument contractor.name leads to cross site scripting. The attack may be launched remotely. The name of the patch is e1646d5cd0a2fbab9eb505196dd2ca1c9e4cdd97. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-216212.

Weakness: CWE-707

Which versions are affected by CVE-2021-4255?

It affects 1 product.

Products include Ctrlo Lenio.

How do I fix CVE-2021-4255?

No fix has been published for CVE-2021-4255 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-2021-4255 being exploited?

There is no known exploitation of CVE-2021-4255 in the wild and no public exploit code.

Sources

Also known as GHSA-r6mp-jcx4-hxp5.