CVE-2025-6756

Ultra Addons for Contact Form 7 <= 3.5.21 - Authenticated (Contributor+) Stored Cross-Site Scripting via UACF7_CUSTOM_FIELDS Shortcode

The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's UACF7_CUSTOM_FIELDS shortcode in all versions up to, and including, 3.5.21 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

We have discovered 494 live websites that are affected by CVE-2025-6756.

Run a Free Instant Scan



Affected Software

Product  Ultimate Addons For Contact Form 7
Category Wordpress Plugins
Vulnerable Domains494 live websites (81% of Ultimate Addons For Contact Form 7 install base)
Vulnerable Versions
  • from 0 through 3.5.21
Vulnerable Versions Count21 versions ( 70% of all versions)


Common Weakness Enumeration

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')



Details

  • Published - Jul 1, 2025
  • Updated - Jul 2, 2025

Credits

  • muhammad yudha (finder)

Website Distribution by Country

Number of websites using CVE-2025-6756
United States136 websites


Germany81 websites
Italy32 websites
Poland27 websites
France23 websites
Cyprus22 websites
GB17 websites
Spain15 websites
South Africa11 websites
Australia11 websites

Website Distribution by TLD

Number of websites using CVE-2025-6756
.com199 websites
.de33 websites
.it26 websites
.pl26 websites
.co.uk17 websites
.com.br13 websites
.org13 websites
.com.au11 websites
.nl8 websites
.ch8 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2025-6756

Top websites that are affected by CVE-2025-6756. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
*****.net United States***,***
*************.es Spain***,***
****.com United States***,***
***********.no United States***,***
*********.pl Poland***,***
*************.com United States***,***
*********.com United States*,***,***
*****************.com United States*,***,***
********.com United States*,***,***
******.com Italy*,***,***
See full domain list

FAQ

CVE-2025-6756 is Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Ultimate Addons For Contact Form 7
A total of 494 websites have been identified as vulnerable to CVE-2025-6756, based on global website indexing conducted by WebTechSurvey.
The Ultimate Addons For Contact Form 7 is affected by the CVE-2025-6756 vulnerability.
Ultimate Addons For Contact Form 7 versions up to and including 3.5.21 are vulnerable to CVE-2025-6756.