CVE-2025-32378: Shopware's default newsletter opt-in settings allow for mass sign-up abuse
Impact
Currently the default settings for double-opt-in allow for mass unsolicited newsletter sign-ups without confirmation.
Default settings are:
Newsletter: Double Opt-in - active
Newsletter: Double opt-in for registered customers - disabled
Log-in & sign-up: Double opt-in on sign-up - 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”.
Patches Update to Shopware 6.6.10.3 or 6.5.8.17
Workarounds For older versions of 6.4, corresponding security measures are also available via a plugin. For the full range of functions, we recommend updating to the latest Shopware version.
Other sources
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.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-32378?
CVE-2025-32378 has a high severity level due to the risk of enabling mass unsolicited newsletter sign-ups.
How do I fix CVE-2025-32378?
To fix CVE-2025-32378, upgrade to versions 6.5.8.17, 6.6.10.3, or 6.7.0.0-rc2 of the affected Shopware packages.
What are the affected software versions for CVE-2025-32378?
CVE-2025-32378 affects Shopware platform versions before 6.5.8.17, 6.6.x before 6.6.10.3, and earlier releases of 6.7.x up to 6.7.0.0-rc2.
What are the default settings related to CVE-2025-32378?
The default settings for CVE-2025-32378 allow double-opt-in for newsletters to be active, while disabling it for registered customers.
Who is impacted by CVE-2025-32378?
Any user or organization using Shopware versions prior to the listed patch releases may be affected by CVE-2025-32378.