CVE-2026-66640

WordPress Login With Ajax plugin <= 4.5.1 - Cross Site Scripting (XSS) vulnerability

Contributor Cross Site Scripting (XSS) in Login With Ajax <= 4.5.1 versions.

We have discovered 6,263 live websites that are affected by CVE-2026-66640.

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Affected Software

Product  Login With Ajax
Category Wordpress Plugins
Vulnerable Domains6,263 live websites (100% of Login With Ajax install base)
Vulnerable Versions
  • from 0 through 4.5.1
Vulnerable Versions Count17 versions ( 100% 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-2026-66640
United States1,873 websites


Germany730 websites
France548 websites
Italy437 websites
GB268 websites
Netherlands216 websites
Russia197 websites
Spain193 websites
Canada127 websites
Brazil126 websites

Website Distribution by TLD

Number of websites using CVE-2026-66640
.com2,323 websites
.de462 websites
.org460 websites
.it319 websites
.fr261 websites
.nl185 websites
.ru160 websites
.net141 websites
.co.uk129 websites
.com.br128 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-66640

Top websites that are affected by CVE-2026-66640. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
****.com Spain*,***
**************.com United States**,***
**********.org United States**,***
****.****.edu United States**,***
******.com United States**,***
*****.info United States**,***
***********.com India**,***
****************.com United States***,***
*************.io United States***,***
****.********.***.au Australia***,***
See full domain list

FAQ

CVE-2026-66640 is Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Login With Ajax
A total of 6,263 websites have been identified as vulnerable to CVE-2026-66640, based on global website indexing conducted by WebTechSurvey.
The Login With Ajax is affected by the CVE-2026-66640 vulnerability.
Login With Ajax versions up to and including 4.5.1 are vulnerable to CVE-2026-66640.