CVE-2026-9857: CWE-862 Missing Authorization in saskaita123 Invoice123
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.
AI Analysis
Technical Summary
CVE-2026-9857 is an authorization bypass vulnerability (CWE-862) affecting the Invoice123 plugin for WordPress. The plugin fails to properly verify user authorization before allowing certain actions. As a result, authenticated users with low privileges (subscriber-level and above) can overwrite the plugin's API key stored in the WordPress options table, modify invoice plugin settings, and alter tax rate data in the WooCommerce tax rates database table. This vulnerability affects all versions up to and including 1.7.0. No official patch or remediation level has been published at this time.
Potential Impact
An attacker with subscriber-level access or higher can manipulate critical plugin configuration data, including the API key and WooCommerce tax rates. This could lead to unauthorized changes in invoicing behavior and tax calculations within the affected WordPress site. The confidentiality of data is not impacted, but the integrity of plugin settings and tax data is compromised. Availability is not affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict user roles to trusted individuals only and monitor for unauthorized changes to plugin settings and WooCommerce tax rates. Avoid granting subscriber-level access to untrusted users.
CVE-2026-9857: CWE-862 Missing Authorization in saskaita123 Invoice123
Description
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.
CVSS v3.1
Score 4.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-9857 is an authorization bypass vulnerability (CWE-862) affecting the Invoice123 plugin for WordPress. The plugin fails to properly verify user authorization before allowing certain actions. As a result, authenticated users with low privileges (subscriber-level and above) can overwrite the plugin's API key stored in the WordPress options table, modify invoice plugin settings, and alter tax rate data in the WooCommerce tax rates database table. This vulnerability affects all versions up to and including 1.7.0. No official patch or remediation level has been published at this time.
Potential Impact
An attacker with subscriber-level access or higher can manipulate critical plugin configuration data, including the API key and WooCommerce tax rates. This could lead to unauthorized changes in invoicing behavior and tax calculations within the affected WordPress site. The confidentiality of data is not impacted, but the integrity of plugin settings and tax data is compromised. Availability is not affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict user roles to trusted individuals only and monitor for unauthorized changes to plugin settings and WooCommerce tax rates. Avoid granting subscriber-level access to untrusted users.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-05-28T15:53:49.759Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a50c6ec68715ace436a3dfd
Added to database: 07/10/2026, 10:18:20 UTC
Last enriched: 07/10/2026, 10:32:52 UTC
Last updated: 08/24/2026, 05:26:09 UTC
Views: 95
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