An error in the email address associated with a store newsletter could interfere with the sending of newsletter email. This error could constitute a Denial of Service attack. In some cases, including accented characters could generate this error.
Part of patch SUPEE-7405
This vulnerability affects the following application versions:
- Magento 1.9.1.1
- Magento 1.9.2.0
- Magento 1.9.2.1
- Magento 1.9.2.2