Shopper: same-origin SVG and HTML uploads enable stored XSS and persistent administrator creation

Summary

CVE	CVE-2026-62990
State	PUBLISHED
Assigner	GitHub_M
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-10-30 21:17:16 UTC
Updated	2026-11-05 03:17:30 UTC
Description	Shopper is a Headless e-commerce Admin Panel. In versions from 2.0.0 prior to 2.10.1 and in the 3.0.0 prereleases beta.1 and beta.2, authenticated back-office staff with a content-upload permission can store executable media on the administrator's own origin. In the 2.x implementation, relevant upload permissions include `edit_products` or `add_brands`, and `packages/admin/config/media.php` allows `image/svg+xml` in every media collection, including image fields whose image/* validation also accepts SVG. The product files collection in `packages/admin/src/Livewire/Components/Products/Form/Files.php` has no MIME restriction and accepts `text/html` as well. Media is served inline from the `public` disk under `/storage/` with its own content type, without `Content-Disposition: attachment` or a `Content-Security-Policy`. When an administrator opens an uploaded HTML or SVG file, stored script executes in that administrator's session. In 2.x, the script can invoke `packages/admin/src/Livewire/SlideOvers/CreateTeamMember.php`, whose `store()` checks `access_setting` held by the viewing administrator but trusts client-supplied `role_id`, to create a new attacker-controlled administrator with a chosen password. This account persists after the uploaded file is deleted and gives access to customer data, orders, settings, and user/role management; the same script can exfiltrate data or grant permissions to the attacker's account. Direct account creation by the low-privileged uploader is blocked, so exploitation requires the administrator to open the file. The 3.x prerelease line already excludes SVG but still allows executable product files. This issue is fixed in versions 2.10.1 and 3.0.0-beta.3.

Risk And Classification

Primary CVSS: v3.1 8.7 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

EPSS: 0.002430000 probability, percentile 0.155850000 (date 2026-11-02)

Problem Types: CWE-79 | CWE-269 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CWE-269 CWE-269: Improper Privilege Management

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Secondary	8.7	HIGH	`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N`
3.1	CNA	DECLARED	8.7	HIGH	`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Shopperlabs	Shopper	affected >= 2.0.0, < 2.10.1	Not specified
CNA	Shopperlabs	Shopper	affected >= 3.0.0-beta.1, < 3.0.0-beta.3	Not specified

References

Reference	Source	Link	Tags
github.com/shopperlabs/shopper/compare/v3.0.0-beta.1...v3.0.0-beta.3	[email protected]	github.com
github.com/shopperlabs/shopper/security/advisories/GHSA-vmvv-x5cp-2qv6	134c704f-9b21-4f2e-91b3-4a467353bcc0	github.com
github.com/shopperlabs/shopper/pull/597	[email protected]	github.com
github.com/shopperlabs/shopper/commit/ad2c5b9b968ff49c37130c6b9d1dba7f20...	[email protected]	github.com
github.com/shopperlabs/shopper/releases/tag/v2.10.1	[email protected]	github.com
github.com/shopperlabs/shopper/releases/tag/v3.0.0-beta.3	[email protected]	github.com
github.com/shopperlabs/shopper/commit/12be681db5f603a364d5f03f1974ff2a20...	[email protected]	github.com
github.com/shopperlabs/shopper/pull/595	[email protected]	github.com
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

There are currently no legacy QID mappings associated with this CVE.