CVE Catalog

CVE-2026-16548

MediumCVSS 6.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.36%

29th percentile - higher than 29% of all known CVEs

Summary

The Chat Widget 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, so this does not yield code execution or stored XSS; impact is bounded to disk consumption and content hosting.

Risk Assessment

An unauthenticated attacker can fill the server disk or use the space for content hosting, potentially leading to resource exhaustion and denial of service.

Recommendation

Upgrade the Chat Widget plugin to version 1.8.2 or later and configure appropriate file upload restrictions.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS