CVE-2021-36911 WordPress Comment Engine Pro plugin <= 1.0 - Stored Cross-Site Scripting (XSS) vulnerability

Q: What is CVE-2021-36911?

CVE-2021-36911 is a medium-severity cross-site scripting vulnerability in @rex1989 Comment Engine Pro (WordPress plugin), published on 10 Dec 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Q: Is CVE-2021-36911 being exploited?

There is no known exploitation of CVE-2021-36911 in the wild and no public exploit code.

Q: How do I fix CVE-2021-36911?

No fix has been published for CVE-2021-36911 yet. Limit exposure of the affected software until one is available.

Medium 4.8 Published 10 Dec 2021 Updated 28 Apr 2026

Stored XSS in WordPress Comment Engine Pro allows Editors to inject scripts, potentially leading to code execution or account takeover.

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-2021-36911?

CVE-2021-36911 is a medium-severity cross-site scripting vulnerability in @rex1989 Comment Engine Pro (WordPress plugin), published on 10 Dec 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

Stored Cross-Site Scripting (XSS) vulnerability discovered in WordPress Comment Engine Pro plugin (versions <= 1.0), could be exploited by users with Editor or higher role.

Weakness: CWE-79

Which versions are affected by CVE-2021-36911?

It affects 1 product.

Products include Comment Engine Pro Project Comment Engine Pro.

How do I fix CVE-2021-36911?

No fix has been published for CVE-2021-36911 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-2021-36911 being exploited?