# CVE-2026-93754: payever – WooCommerce Gateway <= 4.8.0 - Unauthenticated Arbitrary File Upload Leading to Remote Code Execution

Status: published. Published: 2026-11-07. Updated: 2026-11-07.

The payever – WooCommerce Gateway plugin for WordPress is vulnerable to arbitrary file upload leading to remote code execution in various versions up to, and including, 4.8.0. Three WooCommerce-API callbacks (payever_set_sandbox_api_keys, payever_toggle_subscription, payever_synchronization_incoming) are registered with no authentication, capability check, or nonce, and the upload_image() routine writes a remotely fetched file to the public uploads directory using an attacker-controlled basename() BEFORE validating the file type. This makes it possible for unauthenticated attackers to write an executable PHP file and achieve remote code execution. NOTE: the token-recovery leg of the full chain depends on the plugin's outbound validateToken() call to Payever's service; the unauthenticated hard-coded-credential identity overwrite (CWE-862/CWE-798) is independently exploitable.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- payever / payever Checkout – Composable Payment Gateway: ≥ 0; ≤ 4.8.0 (affected, semver). Source: CNA: Wordfence

## Severity and prioritization

- CVSS 3.1: 9.8 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: CNA: Wordfence

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-434

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/03412063-d73a-4c5c-8dc6-3e76a5d975a5?source=cve (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/class-payever-synchronization.php?rev=3647773#L22 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/class-payever-synchronization.php?rev=3647773#L116 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/woocommerce-payever-gateway.php?rev=3647773#L145 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/logger/class-payever-logger.php?rev=3647773#L18 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/class-payever-log-manager.php?rev=3647773#L35 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/synchronization/management/class-payever-subscription-manager.php?rev=3647773#L79 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/class-payever-synchronization.php?rev=3647773#L683 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/synchronization/management/class-payever-import-manager.php?rev=3647773#L21 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/synchronization/actions/class-payever-action-update-product.php?rev=3647773#L448 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/synchronization/actions/class-payever-action-update-product.php?rev=3647773#L547 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/vendor/payever/core-sdk-php/lib/Payever/Core/Http/Client/CurlClient.php?rev=3647773#L258 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/changeset?reponame=&old=3761918%40payever-woocommerce-gateway&new=3761918%40payever-woocommerce-gateway (CNA: Wordfence)

## Provenance

- CNA: Wordfence: https://www.cve.org/CVERecord?id=CVE-2026-93754; retrieved 2026-11-07; source updated 2026-11-07

Revision: 024f2a962752810de485dffb69605aafd8b7ca462926325a94603129c450e92d

Canonical: https://y2.dev/cve/CVE-2026-93754

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.