CVE-2022-4821 FlatPress XML File Handler/MD File admin.uploader.php onupload cross site scripting

Low 2.4 Published 28 Dec 2022 Updated 3 Aug 2024

Remote attackers can inject malicious scripts via the uploader, potentially leading to code execution or account takeover in FlatPress.

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

What is CVE-2022-4821?

CVE-2022-4821 is a low-severity cross-site scripting vulnerability in FlatPress, published on 28 Dec 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

A vulnerability classified as problematic was found in FlatPress. This vulnerability affects the function onupload of the file admin/panels/uploader/admin.uploader.php of the component XML File Handler/MD File Handler. The manipulation leads to cross site scripting. The attack can be initiated remotely. The name of the patch is 3cc223dec5260e533a84b5cf5780d3a4fbf21241. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-217000.

Weakness: CWE-79

Which versions are affected by CVE-2022-4821?

It affects 1 product.

Products include Flatpress Flatpress.

How do I fix CVE-2022-4821?

No fix has been published for CVE-2022-4821 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-2022-4821 being exploited?

There is no known exploitation of CVE-2022-4821 in the wild and no public exploit code.

Sources

Also known as CVE-2023-1103, GHSA-gpvj-w4qp-hf4h.