CVE-2026-108587

Summary

The 10Web Booster plugin allows unauthenticated attackers to upload arbitrary files due to missing validation on file types and extensions, combined with a leaked nonce that bypasses authentication checks. This creates a critical vulnerability that can lead to remote code execution.

Exploitability

Exploitation is relatively straightforward as attackers only need to find the leaked nonce in wp-content/uploads/ and upload malicious files through the compressCustom function, requiring no authentication or user interaction.

Blast radius

The vulnerability affects all WordPress sites using the 10Web Booster plugin version 2.34.10 or earlier, potentially allowing attackers to execute arbitrary code on affected servers with full system access.

Detection

Monitor for unusual file uploads in wp-content/uploads/ directory, particularly executable files (.php, .jsp, .asp) that appear without user interaction, and check for access logs showing requests to /wp-json/tenweb/v1/compressCustom endpoint with suspicious file parameters.

Prioritized remediation

Upgrade to version 2.34.11 or later to fix the Arbitrary File Upload vulnerability.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.