ERPNext 16.16.0 - Stored XSS in POS customer section via unescaped template literals
CVE-2026-42840

5.1MEDIUM

Key Information:

Vendor

Frappe

Status
Erpnext
Vendor
CVE Published:
3 June 2026

What is CVE-2026-42840?

An authenticated user can persist arbitrary HTML/JavaScript in the email_id or mobile_no fields of a Customer record and trigger unescaped rendering in the Point of Sale (POS) interface for every operator who selects that customer. This issue affects ERPNext: 16.16.0.

Affected Version(s)

ERPNext Windows 16.16.0

References

https://fluidattacks.com/es/advisories/weeknd
third-party-advisory
https://github.com/frappe/erpnext
product

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Fluid Attacks' AI SAST Scanner
Oscar Naveda
.