What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-03 · updated 2026-07-22
• Weakness: CWE-79

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.

Affected products

• frappe erpnext: 16.16.0

References

• https://fluidattacks.com/es/advisories/weeknd
• https://github.com/frappe/erpnext
• https://fluidattacks.com/es/advisories/weeknd

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