CVE-2021-28141 Missing authorization in n/a

Critical 9.8 Published 11 Mar 2021 Updated 3 Aug 2024

Unauthorized access to MicrosoftAjax.js via WebResource.axd allows potential server access, though vendor disputes actual code execution or data leakage.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-28141?

CVE-2021-28141 is a critical missing authorization vulnerability in n/a, published on 11 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Progress Telerik UI for ASP.NET AJAX 2021.1.224. It allows unauthorized access to MicrosoftAjax.js through the Telerik.Web.UI.WebResource.axd file. This may allow the attacker to gain unauthorized access to the server and execute code. To exploit, one must use the parameter _TSM_HiddenField_ and inject a command at the end of the URI. NOTE: the vendor states that this is not a vulnerability. The request's output does not indicate that a "true" command was executed on the server, and the request's output does not leak any private source code or data from the server

Weakness: CWE-862

Which versions are affected by CVE-2021-28141?

It affects 1 product.

Products include Progress Telerik Ui for Asp.net Ajax.

How do I fix CVE-2021-28141?

No fix has been published for CVE-2021-28141 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-28141 being exploited?

There is no known exploitation of CVE-2021-28141 in the wild and no public exploit code.

Sources

Also known as GHSA-gvpm-pfj2-852g.