WS-2021-0130
Published:May 14, 2026
Updated:May 14, 2026
Klaviyo Magento 2 before 3.0.0 allows reading private customer data from stores. It works by reclaiming any guest-cart as your own and reading the private data for the orders in the Magento API.
Affected Packages
klaviyo/magento2-extension (PHP):
Affected version(s) =dev-202103_oauth_rebased <dev-202012_oauth_supportFix Suggestion:
Update to version dev-202012_oauth_supportklaviyo/magento2-extension (PHP):
Affected version(s) =dev-202104_product-delete-webhook-store-ids <dev-202104_product-save-webhookFix Suggestion:
Update to version dev-202104_product-save-webhookklaviyo/magento2-extension (PHP):
Affected version(s) =dev-201907_requirejs <dev-202107_rtrim_custom_media_urlFix Suggestion:
Update to version dev-202107_rtrim_custom_media_urlklaviyo/magento2-extension (PHP):
Affected version(s) =dev-202011_product_delete_webhook_api <dev-202111_product_save_webhookFix Suggestion:
Update to version dev-202111_product_save_webhookklaviyo/magento2-extension (PHP):
Affected version(s) >=dev-201905_bis_api <dev-202201_cart_rebuildFix Suggestion:
Update to version dev-202201_cart_rebuildklaviyo/magento2-extension (PHP):
Affected version(s) =dev-202101_version_2_0_0 <dev-m2_v3_upgradeFix Suggestion:
Update to version dev-m2_v3_upgradeklaviyo/magento2-extension (PHP):
Affected version(s) =dev-201904_magento_2_api_and_bundle_images <dev-202106_require_m2_version_2_3_4Fix Suggestion:
Update to version dev-202106_require_m2_version_2_3_4klaviyo/magento2-extension (PHP):
Affected version(s) =dev-201907_media_schema_email <dev-202108_newsletter_fixFix Suggestion:
Update to version dev-202108_newsletter_fixklaviyo/magento2-extension (PHP):
Affected version(s) >=1.0.0 <dev-202110_m2_email_consent_loggedin_usersFix Suggestion:
Update to version dev-202110_m2_email_consent_loggedin_usersklaviyo/magento2-extension (PHP):
Affected version(s) =dev-201904_add <dev-202207_add_pr_templateFix Suggestion:
Update to version dev-202207_add_pr_templateklaviyo/magento2-extension (PHP):
Affected version(s) =dev-202103_sms_c@c <dev-202112_spell_fixesFix Suggestion:
Update to version dev-202112_spell_fixesRelated Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE