MailerLite - WooCommerce integration <= 3.1.3 - Missing Authorization to Data Deletion
Strategic Overview
- Status
- Patched in 3.1.4
- Affected Plugin
- MailerLite – WooCommerce integration
- Affected Version
<= 3.1.3- CVSS
- 6.5Medium
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2026-1000
At a glance
CVE-2026-1000 is a medium-severity Missing Authorization vulnerability in the MailerLite WordPress plugin, affecting versions <= 3.1.3. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high integrity impact). The root cause is a missing authorization check on a reachable function. The issue is fixed in version 3.1.4; sites on affected versions should update now. Disclosed December 2025, reported by shark3y.
Vulnerability Overview
The MailerLite - WooCommerce integration plugin for WordPress is vulnerable to unauthorized data modification and deletion in all versions up to, and including, 3.1.3. This is due to missing capability checks on the resetIntegration() function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to reset the plugin's integration settings, delete all plugin options, and drop the plugin's database tables (woo_mailerlite_carts and woo_mailerlite_jobs), resulting in complete loss of plugin data including customer abandoned cart information and sync job history.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on integrity.
CWE-862: Missing Authorization
MailerLite <= 3.1.3 carries this weakness at resetIntegration(), and reaching it takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.
Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For MailerLite the fix is 3.1.4: builds <= 3.1.3 are affected, anything from 3.1.4 onward is not.
Remediation
Update to version 3.1.4, or a newer patched version
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: MailerLite 3.1.4 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in MailerLite – WooCommerce integration
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