Unauthenticated stored XSS via settlement notifications
Published Oct 3, 2026 · Updated Oct 3, 2026
Stored XSS in Welcart e-Commerce 2.12.2 and earlier allows remote attackers to run scripts in an administrator's browser via settlement notifications. The notification endpoint accepts rel and option values without authentication or signature verification, stores them, and renders them without adequate escaping in the settlement error log. Exploitation requires an administrator to open the affected log view; the demonstrated consequence is script execution in that browser, not server-side code execution.
Summary
What happened
Stored XSS in Welcart e-Commerce 2.12.2 and earlier allows remote attackers to run scripts in an administrator's browser via settlement notifications. The notification endpoint accepts rel and option values without authentication or signature verification, stores them, and renders them without adequate escaping in the settlement error log. Exploitation requires an administrator to open the affected log view; the demonstrated consequence is script execution in that browser, not server-side code execution.
The record
- CVE
- CVE-2026-87091
- Published
- Oct 3, 2026
- Updated
- Oct 3, 2026
- Vendor
- Welcart Inc.
- Product
- Welcart e-Commerce
- Classifications
- T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 3, 2026CVE publishedPublication date reported by the CVE source.
- Oct 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=2.12.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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