EUVD-2026-53033
GHSA-w9j3-mf3m-82pj
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Network-accessible AJAX endpoint requires only a Subscriber session (PR:L); nonce extraction is trivially automated (AC:L); impact is confidentiality-only via API key export with no write 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:H/I:N/A:N
Lifecycle Timeline
2DescriptionCVE.org
The Cost Calculator Builder plugin for WordPress is vulnerable to unauthorized access of sensitive data due to a missing capability check on the cost-calculator-custom-export-run AJAX action (handler CCBExportImport::export_calculators()) in all versions up to, and including, 3.6.17. The handler only verifies a nonce, but the corresponding ccb_export_nonce is broadcast on every wp-admin page (including pages reachable to Subscribers, such as /wp-admin/profile.php) by the ccb_add_admin_nonces callback hooked to admin_head. This makes it possible for authenticated attackers, with Subscriber-level access and above, to export every calculator's full configuration - including stored Stripe secret keys, PayPal client secrets, Razorpay secret keys, webhook secret keys, and reCAPTCHA secret keys.
AnalysisAI
Cost Calculator Builder for WordPress exposes live payment gateway credentials to any authenticated site user through a missing authorization check on its calculator export AJAX endpoint. All plugin versions through 3.6.17 are affected; attackers holding a Subscriber-level WordPress account - the lowest authenticated role - can invoke the cost-calculator-custom-export-run AJAX action to receive a full configuration export containing Stripe secret keys, PayPal client secrets, Razorpay secret keys, webhook secret keys, and reCAPTCHA secret keys. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid WordPress account with at minimum Subscriber-level role on the target site - the lowest non-anonymous role, granted by default when a user registers if the site has open registration enabled (Settings → General → 'Anyone can register'). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N, 6.5 Medium) is technically accurate but understates business impact for sites with active payment integrations. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers a free Subscriber account on the target WordPress site through the standard registration page, then logs into `/wp-admin/profile.php` - a page accessible to all authenticated users - and extracts the `ccb_export_nonce` value embedded in the page's inline JavaScript by the plugin's `ccb_add_admin_nonces` callback. The attacker then sends a single authenticated POST request to `wp-admin/admin-ajax.php` with the parameters `action=cost-calculator-custom-export-run` and the harvested nonce, receiving a full JSON export of all calculator configurations including plaintext Stripe secret keys, which they immediately use to issue unauthorized charges via the Stripe API against the merchant's account. … |
| Remediation | An upstream fix has been committed to the plugin's trunk repository, as evidenced by the changeset between SVN revisions 3528688 and 3531960 (https://plugins.trac.wordpress.org/changeset?new=3531960%40cost-calculator-builder%2Ftrunk&old=3528688%40cost-calculator-builder%2Ftrunk); however, the exact released patch version number is not confirmed by the available data - administrators must verify the current version in the WordPress Plugin Directory exceeds 3.6.17 and apply the update immediately via the WordPress admin dashboard. … Detailed patch versions, workarounds, and compensating controls in full report. |
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