CVE-2025-39578 WordPress Responsive Blocks plugin <= 2.0.2 - Cross Site Scripting (XSS) Vulnerability
Stored XSS in Responsive Blocks plugin allows attackers to inject malicious scripts into web pages viewed by other users.
- 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-2025-39578?
CVE-2025-39578 is a medium-severity cross-site scripting vulnerability in CyberChimps Responsive Blocks, published on 16 Apr 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in CyberChimps Responsive Blocks responsive-block-editor-addons allows Stored XSS.This issue affects Responsive Blocks: from n/a through <= 2.0.2.
Weakness: CWE-79
Which versions are affected by CVE-2025-39578?
How do I fix CVE-2025-39578?
No fix has been published for CVE-2025-39578 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-2025-39578 being exploited?
There is no known exploitation of CVE-2025-39578 in the wild and no public exploit code.
Sources
Also known as GHSA-c3xr-4rp5-847c.