CVE-2021-4363 WP Quick FrontEnd Editor <= 5.5 - Reflected Cross-Site Scripting

What is CVE-2021-4363?

CVE-2021-4363 is a medium-severity cross-site scripting vulnerability in labibahmed42 WP Quick FrontEnd Editor – WordPress Plugin, published on 7 Jun 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The WP Quick FrontEnd Editor plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 5.5 due to insufficient input sanitization and output escaping on the 'save_content_front' function that uses print_r on the user-supplied $_REQUEST values . This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Weakness: CWE-79

Which versions are affected by CVE-2021-4363?

It affects 1 product.

Products include Webdevocean Wp Quick Frontend Editor.

How do I fix CVE-2021-4363?

No fix has been published for CVE-2021-4363 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-2021-4363 being exploited?

There is no known exploitation of CVE-2021-4363 in the wild and no public exploit code.

Other vulnerabilities in labibahmed42 WP Quick FrontEnd Editor – WordPress Plugin

• CVE-2021-4383 WP Quick FrontEnd Editor <= 5.5 - Authenticated (Subscriber+) Content Injection High 8.1
• CVE-2021-4378 WP Quick FrontEnd Editor <= 5.5 - Authenticated (Subscriber+) Stored Cross-Site Scripting Medium 6.4

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f37x-r3cc-2x57.