FacturaONE unauthenticated file write can lead to code execution
FacturaONE para WooCommerce con VeriFactu before 5.37 exposes a request handler that relies only on a key which is empty when the plugin has not been configured. An unauthenticated attacker can reach that handler on a default or unconfigured installation and write an arbitrary file into a web-accessible directory; writing executable PHP can result in remote code execution. The CNA record does not identify the handler, action, parameters or file-writing function.
- Component
- FacturaONE para WooCommerce con VeriFactu
- Plugin slug
facturaone-para-woocommerce-con-verifactu- Affected
- < 5.37
- Safe version
5.37- Published
- Jul 27, 2026
This CVE was published Jul 27, 2026 and is one of 1 known issue for this plugin.
Update, patch or deactivate.
Update FacturaONE para WooCommerce con VeriFactu to 5.37 or later. Inspect web-accessible directories for unexpected files, review administrator accounts and rotate WordPress salts and database credentials if a vulnerable installation was exposed.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The FacturaONE para WooCommerce con VeriFactu WordPress plugin before 5.37 does not authenticate one of its request handlers, whose only protection is derived from a cryptographic key that is empty in the default, unconfigured state, allowing unauthenticated attackers to write an arbitrary file into a web-accessible directory and achieve remote code execution.
CVE / CNA vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H