CVE-2026-121557 Details
Description
WPPConnect Server through 2.10.74 contains a missing authentication vulnerability that allows unauthenticated attackers to send WhatsApp messages by calling the Chatwoot webhook route without verifyToken middleware. Attackers who know or guess a connected session name can POST outgoing message bodies to send arbitrary texts or files from that account to any number.
A missing authentication vulnerability has been identified in WPPConnect Server versions through 2.10.74. This vulnerability allows unauthenticated attackers to send WhatsApp messages by accessing the Chatwoot webhook route, which lacks the necessary authentication middleware. Attackers who can guess or know a connected session name can exploit this by sending outgoing message bodies, thereby transmitting arbitrary texts or files from the victim's account to any recipient.
The vulnerability has been fixed in version 2.10.75. Users should update to this version. Instructions for updating can be found in the WPPConnect Server GitHub repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 3, 2026CISA-ADP
Assessed Nov 7, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-306 | Missing Authentication for Critical Function | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| WPPConnect Server | <= 2.10.74 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 7, 2026 | CVE Modified | CISA-ADP |
| Nov 3, 2026 | New CVE Received | [email protected] |