CVE-2021-36803 Akaunting Avatar Persistent XSS

Medium 6.3 Published 4 Aug 2021 Updated 16 Sep 2024

Attackers can inject malicious scripts via avatar uploads in Akaunting, potentially stealing user sessions or executing code.

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-2021-36803?

CVE-2021-36803 is a medium-severity cross-site scripting vulnerability in Akaunting, published on 4 Aug 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Akaunting version 2.1.12 and earlier suffers from a persistent (type II) cross-site scripting (XSS) vulnerability in processing user-supplied avatar images. This issue was fixed in version 2.1.13 of the product.

Weakness: CWE-79

Which versions are affected by CVE-2021-36803?

It affects 1 product.

Products include Akaunting Akaunting.

How do I fix CVE-2021-36803?

No fix has been published for CVE-2021-36803 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-2021-36803 being exploited?

There is no known exploitation of CVE-2021-36803 in the wild and no public exploit code.

Sources

Also known as GHSA-6qpx-rx7g-pcgc.