Stored XSS via unescaped POS item fields
Published Jun 3, 2026 · Updated Jun 3, 2026
Stored XSS in Frappe ERPNext 16.16.0 allows remote authenticated users to execute script in POS operators' browsers via Item fields. The render_cart_item function interpolates item_name, description, and image values into an HTML template and passes it to jQuery .html() without effective escaping. Item edit permission is required, and execution occurs when a POS operator adds the poisoned item to a transaction, enabling actions in that operator's browser context.
Summary
What happened
Stored XSS in Frappe ERPNext 16.16.0 allows remote authenticated users to execute script in POS operators' browsers via Item fields. The render_cart_item function interpolates item_name, description, and image values into an HTML template and passes it to jQuery .html() without effective escaping. Item edit permission is required, and execution occurs when a POS operator adds the poisoned item to a transaction, enabling actions in that operator's browser context.
The record
- CVE
- CVE-2026-42839
- Published
- Jun 3, 2026
- Updated
- Jun 3, 2026
- Vendor
- Frappe Technologies Pvt. Ltd.
- Product
- ERPNext
- Classifications
- T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 3, 2026CVE publishedPublication date reported by the CVE source.
- Jun 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=16.16.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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