CVE-2025-5336 Click to Chat <= 4.22 - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via data-no_number Parameter
Authenticated attackers can inject arbitrary scripts via the data-no_number parameter, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-5336?
CVE-2025-5336 is a medium-severity cross-site scripting vulnerability in Click to Chat – HoliThemes, published on 14 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Click to Chat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘data-no_number’ parameter in all versions up to, and including, 4.22 to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2025-5336?
How do I fix CVE-2025-5336?
No fix has been published for CVE-2025-5336 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-2025-5336 being exploited?
There is no known exploitation of CVE-2025-5336 in the wild and no public exploit code.
Sources
Also known as GHSA-83pp-hvhj-8fv5.