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Medium

Shopware: Stored XSS via SVG file upload — no SVG sanitization

  • Disclosed: 04.06.2026
  • Updated: 11.10.2026 10:22

SVG files are in the allowed_extensions whitelist and can be uploaded by any admin user via the media manager. There is zero SVG content sanitization anywhere in the upload pipeline. A malicious SVG with JavaScript (onload, <script>, <foreignObject>) executes in the context of the Shopware domain when accessed.

The Problem

In src/Core/Framework/Resources/config/packages/shopware.yaml, line 194:

yaml
allowed_extensions: ["jpg", "jpeg", "png", "webp", "avif", "gif", "svg", ...]

SVG is whitelisted. The upload path (MediaUploadController → FileSaver → TypeDetector) recognizes SVG as ImageType with VECTOR_GRAPHIC flag, but no code strips JavaScript, event handlers, or external entity references from the SVG XML.

A search of the entire codebase for SVG sanitization returns — no DOMPurify, no svg-sanitize, no strip_tags on SVG content, nothing.

Impact

Stored XSS affecting all users who view the uploaded SVG. In an e-commerce context, this can lead to admin account takeover, customer data theft, or malicious plugin installation.

Suggested Fix

Either:

  1. Remove SVG from allowed_extensions if SVG upload is not a core requirement
  2. Sanitize SVG content on upload using a library like enshrined/svg-sanitize (strips scripts, event handlers, external references)
  3. Serve SVGs with Content-Disposition: attachment to prevent inline rendering
  4. Serve SVGs from a separate domain (like Nextcloud's usercontent.apps.nextcloud.com)

Option 2 is the most practical — enshrined/svg-sanitize is already used by WordPress and other PHP projects.

Regards & BG, Keyvan Hardani

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package shopware/core >= 6.7.0.0, < 6.7.10.1, < 6.6.10.18 6.7.10.1, 6.6.10.18
Composer package shopware/platform >= 6.7.0.0, < 6.7.10.1, < 6.6.10.18 6.7.10.1, 6.6.10.18

References

CVSS score 4.9/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE)
CWE-79
Platform
Composer
Package
shopware/core, shopware/platform
Disclosed
04.06.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-xvhc-gm7j-mhmc - CC BY 4.0

Vulnerability history: shopware/core

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (65) in the archive
Total entries
65
First → latest
09.2020 06.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 5
  • High 16
  • Medium 31
  • Low 13

Disclosures per year

Severity:
  1. Shopware: Stored XSS via SVG file upload — no SVG sanitization this entry
    Medium · 4.9 CVE-2026-48015 >= 6.7.0.0, < 6.7.10.1, < 6.6.10.18 6.7.10.1, 6.6.10.18
  2. Shopware vulnerable to a potential take over of app credentials
    High · 8.9 CVE-2026-31889 >= 6.7.0.0, < 6.7.8.1, < 6.6.10.15 6.7.8.1, 6.6.10.15
  3. Shopware: Unauthenticated data extraction possible through store-api.order endpoint
    High CVE-2026-31887 >= 6.7.0.0, < 6.7.8.1, < 6.6.10.15 6.7.8.1, 6.6.10.15
  4. Shopware Has Improper Control of Generation of Code in Twig rendered views
    High · 7.2 CVE-2026-23498 >= 6.7.0.0, < 6.7.6.1 6.7.6.1
  5. Shopware: Reflective Cross Site-Scripting (XSS) in CMS components
    High · 8.8 ghsa-9v82-vcjx-m76j >= 6.7.0.0, < 6.7.2.1 6.7.2.1
  6. Shopware Vulnerable to Blind SQL-injection in DAL aggregations
    High · 7.3 CVE-2025-27892 >= 6.7.0.0-rc1, < 6.7.0.0-rc2, >= 6.6.0.0, < 6.6.10.3, < 6.5.8.18 6.7.0.0-rc2, 6.6.10.3, 6.5.8.18
  7. Shopware allows Denial Of Service via password length
    High · 7.5 CVE-2025-30151 >= 6.6.0.0, < 6.6.10.3, >= 6.7.0.0-rc1, < 6.7.0.0-rc2, < 6.5.8.17 6.6.10.3, 6.7.0.0-rc2, 6.5.8.17
  8. Shopware vulnerable to Server Side Template Injection in Twig using Context functions
    High · 8.3 CVE-2024-42356 < 6.5.8.13, >= 6.6.0.0, < 6.6.5.1 6.5.8.13, 6.6.5.1
  9. Shopware vulnerable to Server Side Template Injection in Twig using deprecation silence tag
    High · 8.3 CVE-2024-42355 < 6.5.8.13, >= 6.6.0.0, < 6.6.5.1 6.5.8.13, 6.6.5.1
  10. Blind SQL injection in shopware
    Critical · 9.3 CVE-2024-22406 < 6.5.7.4 6.5.7.4
  11. Shopware Has Improper Control of Generation of Code in Twig rendered views
    High · 8.8 CVE-2023-2017 < 6.4.20.1 6.4.20.1
  12. Shopware vulnerable to Improper Control of Generation of Code in Twig rendered views
    Critical · 9.8 CVE-2023-22731 < 6.4.18.1 6.4.18.1
  13. Shopware database password is leaked to an unauthenticated users
    High · 7.5 CVE-2020-13997 >= 6.0.0, < 6.2.3 6.2.3
  14. Improper Access Control in Shopware
    High · 8.1 CVE-2022-24872 < 6.4.10.1 6.4.10.1
  15. Server-Side Request Forgery (SSRF) in Shopware
    High · 7.2 CVE-2022-24871 < 6.4.10.1 6.4.10.1
  16. Webcache Poisoning in shopware/platform and shopware/core
    Critical ghsa-r64m-qchj-hrjp < 6.4.6.1 6.4.6.1
  17. Command injection in mail agent settings
    High · 8.8 CVE-2021-37708 < 6.4.3.1 6.4.3.1
  18. Cross-Site Scripting via SVG media files
    High · 8.0 CVE-2021-37710 < 6.4.3.1 6.4.3.1
  19. Authenticated server-side request forgery in file upload via URL.
    High · 8.8 CVE-2021-37711 < 6.4.3.1 6.4.3.1
  20. Exposure of Sensitive Information to an Unauthorized Actor
    High · 7.5 CVE-2021-32717 < 6.4.1.1 6.4.1.1
  21. After order payment process manipulation in shopware/platform and shopware/core
    Critical ghsa-88rc-3p98-rgvx < 6.3.5.3 6.3.5.3
  22. Leak of information via Store-API aggregations in shopware/platform and shopware/core
    Critical ghsa-qg7c-q3vq-rgxr < 6.3.5.3 6.3.5.3

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