CVE-2026-66636

WordPress Wise Chat plugin <= 3.4 - Cross Site Scripting (XSS) vulnerability

Contributor Cross Site Scripting (XSS) in Wise Chat <= 3.4 versions.

We have discovered 685 live websites that are affected by CVE-2026-66636.

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Affected Software

Product  Wise Chat
Category Wordpress Plugins
Vulnerable Domains685 live websites (98% of Wise Chat install base)
Vulnerable Versions
  • from 0 through 3.4
Vulnerable Versions Count15 versions ( 94% of all versions)


Common Weakness Enumeration

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



Details

  • Published - Aug 18, 2026
  • Updated - Aug 18, 2026

Credits

  • Ananda Dhakal (Patchstack) | Patchstack Bug Bounty Program (finder)

Website Distribution by Country

Number of websites using CVE-2026-66636
United States221 websites


Germany103 websites
GB37 websites
France32 websites
Netherlands26 websites
Spain23 websites
Italy21 websites
Cyprus15 websites
Poland13 websites
Brazil12 websites

Website Distribution by TLD

Number of websites using CVE-2026-66636
.com284 websites
.org60 websites
.de52 websites
.net23 websites
.nl19 websites
.it14 websites
.fr13 websites
.co.uk13 websites
.es10 websites
.pl10 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-66636

Top websites that are affected by CVE-2026-66636. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
*******.tv United States***,***
************.com United States***,***
******.pl Poland***,***
***********.com United States***,***
***.**.jp Japan***,***
************************.org United States***,***
*****.fi Finland***,***
****************.com United States***,***
**********.nl Netherlands***,***
******.net United States***,***
See full domain list

FAQ

CVE-2026-66636 is Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Wise Chat
A total of 685 websites have been identified as vulnerable to CVE-2026-66636, based on global website indexing conducted by WebTechSurvey.
The Wise Chat is affected by the CVE-2026-66636 vulnerability.
Wise Chat versions up to and including 3.4 are vulnerable to CVE-2026-66636.