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Vulnerabilities

Vulnerability · GHSA-mch6-932v-3cm8

Shopware newsletter double-opt-in bypass

Published Sep 16, 2026 · catalog updated Sep 16, 2026 · Shopware newsletter double-opt-in bypass

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for GHSA-mch6-932v-3cm8. A missing EPSS score is not a low risk. Compare Shopware newsletter double-opt-in bypass with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Shopware newsletter double-opt-in bypass).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Version ranges on file
Affected products
composer shopware/core · composer shopware/platform

## Summary When newsletter double opt-in is enabled, an unauthenticated Store API caller could activate a newsletter subscription without proving control of the email address. ## Impact This allowed unauthorized newsletter subscriptions, including subscriptions for email addresses belonging to existing customers. The issue affects the consent and integrity of newsletter recipient data but does not enable account takeover or data disclosure. ## Affected versions - All Shopware versions before 6.6.10.25, including 6.5.x and earlier, and 6.6.0.0 through 6.6.10.24 - Shopware 6.7.0.0 through 6.7.14.0 ## Patches The issue is fixed in Shopware 6.6.10.25 and 6.7.14.1. The patch ensures that newsletter activation requires the configured double-opt-in confirmation flow. ## Workarounds Administrators who cannot upgrade should temporarily disable public newsletter subscriptions until a patched version can be installed. ## Credits Thanks to @hataiit9x for responsibly reporting this vulnerability.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • composer shopware/core<6.6.10.25
  • composer shopware/core>=6.7.0.0 <6.7.14.1
  • composer shopware/platform <6.6.10.25
  • composer shopware/platform>=6.7.0.0 <6.7.14.1

How to fix GHSA-mch6-932v-3cm8

  • Upgrade

    GHSA-mch6-932v-3cm8 lists a fix boundary at 6.6.10.25. Compare the installed build with that boundary before you change production.

  • Version check

    Affected <6.6.10.25

  • Advisory

    Open the inventory_github record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for GHSA-mch6-932v-3cm8. A missing EPSS score is not a low risk. Compare Shopware newsletter double-opt-in bypass with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with <6.6.10.25, >=6.7.0.0 <6.7.14.1, <6.6.10.25. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Shopware security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 16, 2026 · Maintainer security tabs

    Detected

    ## Summary When newsletter double opt-in is enabled, an unauthenticated Store API caller could activate a newsletter subscription without proving control of the email address. ## Impact This allowed unauthorized newsletter subscriptions, including subscriptions for email addresses belonging to existing customers. The issue affects the consent and integrity of newsletter recipient data but does not

Sources

  • Maintainer security tabsVendor advisoryGHSA-mch6-932v-3cm8

    ## Summary When newsletter double opt-in is enabled, an unauthenticated Store API caller could activate a newsletter subscription without proving control of the email address. ## Impact This allowed unauthorized newsletter subscriptions, including subscriptions for email addresses belonging to existing customers. The issue affects the consent and integrity of newsletter recipient data but does not

    github.com

Freshness

Last verified in this catalog Sep 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Maintainer security tabsNov 2, 2026