CVE-2026-27539

WordPress Welcart e-Commerce plugin <= 2.11.31 - Cross Site Scripting (XSS) vulnerability

Unauthenticated Cross Site Scripting (XSS) in Welcart e-Commerce <= 2.11.31 versions.

We have discovered 6,007 live websites that are affected by CVE-2026-27539.

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Affected Software

Product  Welcart
Category Ecommerce
Vulnerable Domains6,007 live websites (95% of Welcart install base)
Vulnerable Versions
  • from 0 through 2.11.31
Vulnerable Versions Count191 versions ( 99% of all versions)


Common Weakness Enumeration

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



Details

  • Published - Aug 13, 2026
  • Updated - Aug 13, 2026

Credits

  • K. Sorrachat | Patchstack Bug Bounty Program (finder)

Website Distribution by Country

Number of websites using CVE-2026-27539
United States121 websites


Japan5,567 websites
China5 websites
GB5 websites
Canada3 websites
Spain3 websites
Australia2 websites
Germany2 websites
Italy2 websites

Website Distribution by TLD

Number of websites using CVE-2026-27539
.com3,096 websites
.jp1,270 websites
.co.jp762 websites
.net436 websites
.info71 websites
.org62 websites
.co5 websites
.it3 websites
.be2 websites
.com.au2 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-27539

Top websites that are affected by CVE-2026-27539. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
*******.jp Japan**,***
*****.**.jp Japan***,***
*****************.com Japan***,***
******.****.**.jp Japan***,***
***.**.jp Japan***,***
**********.jp Japan***,***
***************.jp Japan***,***
****.org Japan***,***
******.jp Japan***,***
*************.net ***,***
See full domain list

FAQ

CVE-2026-27539 is Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Welcart
A total of 6,007 websites have been identified as vulnerable to CVE-2026-27539, based on global website indexing conducted by WebTechSurvey.
The Welcart is affected by the CVE-2026-27539 vulnerability.
Welcart versions up to and including 2.11.31 are vulnerable to CVE-2026-27539.