CVE-2026-65439

WordPress Ultimate Addons for Contact Form 7 plugin <=3.5.45 - Cross Site Scripting (XSS) vulnerability

Unauthenticated Cross Site Scripting (XSS) in Ultimate Addons for Contact Form 7 <=3.5.45 versions.

We have discovered 3,551 live websites that are affected by CVE-2026-65439.

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Affected Software

Product  Ultimate Addons For Contact Form 7
Category Wordpress Plugins
Vulnerable Domains3,551 live websites (94% of Ultimate Addons For Contact Form 7 install base)
Vulnerable Versions
  • from 0 through 3.5.45
Vulnerable Versions Count63 versions ( 97% of all versions)


Common Weakness Enumeration

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



Details

  • Published - Jul 27, 2026
  • Updated - Jul 28, 2026

Credits

  • Nguyen Ba Khanh | Patchstack Bug Bounty Program (finder)

Website Distribution by Country

Number of websites using CVE-2026-65439
United States837 websites


Germany535 websites
Italy189 websites
France187 websites
GB171 websites
India122 websites
Netherlands120 websites
Poland105 websites
Spain89 websites
Canada79 websites

Website Distribution by TLD

Number of websites using CVE-2026-65439
.com1,248 websites
.de374 websites
.org172 websites
.it140 websites
.nl114 websites
.fr91 websites
.co.uk87 websites
.pl76 websites
.com.au66 websites
.ch65 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-65439

Top websites that are affected by CVE-2026-65439. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
*********.com United States*,***
******.com United States*,***
*********.com Croatia**,***
***.br Brazil***,***
********.com United States***,***
*******.de Germany***,***
*****.org United States***,***
****.***.dz Algeria***,***
******.it Cyprus***,***
********.com Bangladesh***,***
See full domain list

FAQ

CVE-2026-65439 is Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Ultimate Addons For Contact Form 7
A total of 3,551 websites have been identified as vulnerable to CVE-2026-65439, based on global website indexing conducted by WebTechSurvey.
The Ultimate Addons For Contact Form 7 is affected by the CVE-2026-65439 vulnerability.
Ultimate Addons For Contact Form 7 versions up to and including 3.5.45 are vulnerable to CVE-2026-65439.