EUVD-2026-42859
GHSA-q7j5-p4m6-7h8q
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Subscriber-level authentication required (PR:L); network-reachable handlers with no complexity; integrity-only impact on plugin settings and tax data, no confidentiality or availability effect.
Primary rating from Vendor (wordfence).
CVSS VectorVendor: wordfence
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Authorization bypass in the Invoice123 WordPress plugin (versions up to and including 1.7.0) permits authenticated attackers holding only subscriber-level accounts to overwrite the plugin's external API key, modify invoice configuration settings, and directly alter WooCommerce tax rate records in the database. The root cause is absent capability checks in the plugin's admin-page handlers, meaning low-privilege users can invoke privileged administrative actions over the network. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated WordPress session with at minimum subscriber-level access, as confirmed by the CVSS PR:L metric - completely unauthenticated attacks are not possible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The official CVSS 3.1 score of 4.3 (Medium) accurately reflects the bounded impact: integrity-only, no confidentiality or availability effect, and a meaningful authentication prerequisite (PR:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers a free subscriber account on a WordPress site with open registration running Invoice123 ≤ 1.7.0, then sends a crafted authenticated HTTP POST request directly to the vulnerable handler endpoints in S123_ApiKey.php or S123_InvoiceSettings.php, bypassing the absent authorization checks. The attacker replaces the stored API key in wp_options with one pointing to an attacker-controlled service, silently redirecting invoice integrations, or modifies WooCommerce tax rates in wp_woocommerce_tax_rates to reduce applicable taxes on their own purchases. … |
| Remediation | The primary remediation is to update the Invoice123 plugin beyond version 1.7.0; the upstream fix commit is visible at the WordPress plugin Trac changeset (https://plugins.trac.wordpress.org/changeset?reponame=&old=3594935%40saskaita123-lt&new=3594935%40saskaita123-lt), but the exact patched release version is not confirmed - verify the current version on the WordPress.org plugin page before advising an upgrade target. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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