CVE-2026-42840

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

State: Published
Severity: 5.1 Medium
Published: Jun 3, 2026
Updated: Jun 3, 2026
Reserved: Apr 30, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	5.1 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N	Fluid Attacks

Weaknesses

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

Affected Products

Product	Versions
ERPNextFrappe	16.16.0Affected

References

https://fluidattacks.com/es/advisories/weekndthird-party-advisory
https://github.com/frappe/erpnextproduct

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