Shopware's default newsletter opt-in settings allow for mass sign-up abuse
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
Shopware is an open source e-commerce software platform. Prior to 6.6.10.3 or 6.5.8.17, the default settings for double-opt-in allow for mass unsolicited newsletter sign-ups without confirmation. Default settings are Newsletter: Double Opt-in set to active, Newsletter: Double opt-in for registered customers set to disabled, and Log-in & sign-up: Double opt-in on sign-up set to disabled. With these settings, anyone can register an account on the shop using any e-mail-address and then check the check-box in the account page to sign up for the newsletter. The recipient will receive two mails confirming registering and signing up for the newsletter, no confirmation link needed to be clicked for either. In the backend the recipient is set to “instantly active”. This vulnerability is fixed in 6.6.10.3 or 6.5.8.17.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| shopware | shopware | before 6.5.8.17; 6.6.0.0 to before 6.6.10.3; 6.7.0.0-rc1 to before 6.7.0.0-rc2 | 6.5.8.17, 6.6.10.3, 6.7.0.0-rc2 | Patch available | CNA |
| — | shopware/core (Packagist) | 6.6.0.0-rc1 to before 6.6.10.3 | 6.6.10.3 | Patch available | GHSA-4h9w-7vfp-px8m |
| — | shopware/platform (Packagist) | 6.6.0.0-rc1 to before 6.6.10.3 | 6.6.10.3 | Patch available | GHSA-4h9w-7vfp-px8m |
| — | shopware/platform (Packagist) | 6.7.0.0-rc1 to before 6.7.0.0-rc2 | 6.7.0.0-rc2 | Patch available | GHSA-4h9w-7vfp-px8m |
| — | shopware/core (Packagist) | 6.7.0.0-rc1 to before 6.7.0.0-rc2 | 6.7.0.0-rc2 | Patch available | GHSA-4h9w-7vfp-px8m |
| — | shopware/core (Packagist) | before 6.5.8.17 | 6.5.8.17 | Patch available | GHSA-4h9w-7vfp-px8m |
| — | shopware/platform (Packagist) | before 6.5.8.17 | 6.5.8.17 | Patch available | GHSA-4h9w-7vfp-px8m |
- shopware Vendorshopware Affected before 6.5.8.17; 6.6.0.0 to before 6.6.10.3; 6.7.0.0-rc1 to before 6.7.0.0-rc2 Fixed in 6.5.8.17, 6.6.10.3, 6.7.0.0-rc2 Patch available CNA
- shopware/core (Packagist) Vendor— Affected 6.6.0.0-rc1 to before 6.6.10.3 Fixed in 6.6.10.3 Patch available GHSA-4h9w-7vfp-px8m
- shopware/platform (Packagist) Vendor— Affected 6.6.0.0-rc1 to before 6.6.10.3 Fixed in 6.6.10.3 Patch available GHSA-4h9w-7vfp-px8m
- shopware/platform (Packagist) Vendor— Affected 6.7.0.0-rc1 to before 6.7.0.0-rc2 Fixed in 6.7.0.0-rc2 Patch available GHSA-4h9w-7vfp-px8m
- shopware/core (Packagist) Vendor— Affected 6.7.0.0-rc1 to before 6.7.0.0-rc2 Fixed in 6.7.0.0-rc2 Patch available GHSA-4h9w-7vfp-px8m
- shopware/core (Packagist) Vendor— Affected before 6.5.8.17 Fixed in 6.5.8.17 Patch available GHSA-4h9w-7vfp-px8m
- shopware/platform (Packagist) Vendor— Affected before 6.5.8.17 Fixed in 6.5.8.17 Patch available GHSA-4h9w-7vfp-px8m
Remediation
- Fix · CNA shopware (shopware) Fixed in 6.5.8.17, 6.6.10.3, 6.7.0.0-rc2
- Fix · GHSA-4h9w-7vfp-px8m shopware/core (Packagist) Fixed in 6.6.10.3 Advisory →
- Fix · GHSA-4h9w-7vfp-px8m shopware/platform (Packagist) Fixed in 6.6.10.3 Advisory →
- Fix · GHSA-4h9w-7vfp-px8m shopware/platform (Packagist) Fixed in 6.7.0.0-rc2 Advisory →
- Fix · GHSA-4h9w-7vfp-px8m shopware/core (Packagist) Fixed in 6.7.0.0-rc2 Advisory →
- Fix · GHSA-4h9w-7vfp-px8m shopware/core (Packagist) Fixed in 6.5.8.17 Advisory →
- Fix · GHSA-4h9w-7vfp-px8m shopware/platform (Packagist) Fixed in 6.5.8.17 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-32378
- 2026-10-03 Alias added: GHSA-4h9w-7vfp-px8m
References
More Shopware vulnerabilities
- TI-2023-01895 Improper Control of Generation of Code in Twig Rendered Views in Shopware CVSS 3.1HIGH 8.8
- TI-2025-20623 Shopware prior to version 6.5.8.13 is affected by a SQL injection vulnerability in the… CVSS 3.1MEDIUM 6.8
- TI-2024-28343 Shopware vulnerable to Server Side Template Injection in Twig using Context functions CVSS 3.1HIGH 8.3
- TI-2019-09582 In createInstanceFromNamedArguments in Shopware through 5.6.x, a crafted web request can… CVSS 3.1HIGH 8.8
- TI-2016-02607 The backend/Login/load/ script in Shopware before 5.1.5 allows remote attackers to execute arbitrary code. CVSS 3.0CRITICAL 9.8
- TI-2025-32365 A stored cross-site scripting (XSS) vulnerability exists in the Shopware 6 installation… CVSS 3.1MEDIUM 6.1
Sources
- CVE-2025-32378 · CVE Program
- CVE-2025-32378 · NVD
- FIRST EPSS
- GHSA-4h9w-7vfp-px8m · GitHub Advisory Database · CC BY 4.0
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