# CVE-2026-62990: Shopper: same-origin SVG and HTML uploads enable stored XSS and persistent administrator creation

Status: published. Published: 2026-10-30. Updated: 2026-11-05.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- shopperlabs / shopper: >= 2.0.0, < 2.10.1 (affected); >= 3.0.0-beta.1, < 3.0.0-beta.3 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 8.7 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: 0.24% as of 2026-11-04; percentile 15.67%

- SSVC: exploitation poc; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-79, CWE-269

## Exploit evidence

- exploit: https://github.com/shopperlabs/shopper/security/advisories/GHSA-vmvv-x5cp-2qv6 (ADP: CISA-ADP)

## References

- https://github.com/shopperlabs/shopper/security/advisories/GHSA-vmvv-x5cp-2qv6 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/shopperlabs/shopper/pull/595 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/shopperlabs/shopper/pull/597 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/shopperlabs/shopper/commit/12be681db5f603a364d5f03f1974ff2a20e99b99 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/shopperlabs/shopper/commit/ad2c5b9b968ff49c37130c6b9d1dba7f20eebbf6 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/shopperlabs/shopper/compare/v3.0.0-beta.1...v3.0.0-beta.3 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/shopperlabs/shopper/releases/tag/v2.10.1 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/shopperlabs/shopper/releases/tag/v3.0.0-beta.3 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/shopperlabs/shopper/security/advisories/GHSA-vmvv-x5cp-2qv6 (ADP: CISA-ADP; exploit)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-62990; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-62990; retrieved 2026-11-05; source updated Not reported

Revision: ca7263416c92dc5162407532710e8ce6776012e106d9c903b9577b00df21cec6

Canonical: https://y2.dev/cve/CVE-2026-62990

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