CVE-2026-9857
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk38th percentile - higher than 38% of all known CVEs
Summary
The Invoice123 plugin for WordPress up to version 1.7.0 inclusive contains an authorization bypass vulnerability. Authenticated attackers with subscriber-level access or higher can overwrite the API key stored in WordPress options, modify plugin settings, and alter WooCommerce tax rate data.
Risk Assessment
The risk includes unauthorized modification of the API key, which could lead to compromise of communication with external services, as well as changes to tax rates, potentially causing billing errors and financial losses.
Recommendation
It is recommended to immediately update the Invoice123 plugin to the latest available version that fixes this vulnerability. Additionally, review and reset API keys and verify WooCommerce tax settings.
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Original NVD description (English source)
The Invoice123 plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.7.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the plugin's API key stored in wp_options, modify invoice plugin settings, and alter WooCommerce tax rate data in the wp_woocommerce_tax_rates table.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS