CVE-2026-16548: Bit Assist < 1.8.2 - Unauthenticated Arbitrary File Upload via Response Endpoint
The Chat Widget: Floating Customer Support Button for 30+ Channels, Supporting SMS, Calls, and Chat WordPress plugin before 1.8.2 does not validate the type, extension, content, or size of files submitted to its public response endpoint and stores them under the uploads directory, so an unauthenticated user can upload arbitrary files. The original extension is discarded (files are stored under a bare UUID), so this does not yield code execution or stored XSS; impact is bounded to disk consumption and content hosting. The storing path requires the channel's response storage or mail-forwarding to be configured.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Bit Assist < 1.8.2 - WordPress plugin (The Chat Widget)to a version that resolves this vulnerability.Fixed in 1.8.2 - Configuration
Update the plugin so that the public response endpoint validates the submitted file type, extension, content, and size before storing anything.
WordPress plugin (The Chat Widget: Floating Customer Support Button for 30+ Channels) public response endpoint file handling (type/extension/content/size validation) = Enable validation for uploaded files (reject/limit by type, extension, content, and size) - Configuration
Ensure the plugin’s channel response storage or mail-forwarding required for storing uploads is not configured unless strictly needed, since the storing path requires it.
WordPress uploads directory storage channel response storage / mail-forwarding configuration = Unconfigured/unavailable