CVE-2021-33199 Path traversal in n/a

Critical 9.8 Published 12 Aug 2021 Updated 3 Aug 2024

Attackers can read arbitrary files by manipulating the addon icon path parameter in ExpressionEngine.

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-2021-33199?

CVE-2021-33199 is a critical path traversal vulnerability in n/a, published on 12 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Expression Engine before 6.0.3, addonIcon in Addons/file/mod.file.php relies on the untrusted input value of input->get('file') instead of the fixed file names of icon.png and icon.svg.

Weakness: CWE-20

Which versions are affected by CVE-2021-33199?

It affects 1 product.

Products include Expressionengine Expressionengine.

How do I fix CVE-2021-33199?

No fix has been published for CVE-2021-33199 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2021-33199 being exploited?

There is no known exploitation of CVE-2021-33199 in the wild and no public exploit code.

Sources

Also known as GHSA-95cm-jhq2-c7fg.