Session Vulnerability in SMS Alert WordPress Plugin Affecting User Authentication
CVE-2026-15206

7.5HIGH

Key Information:

Vendor

WordPress
Status
Sms Alert
Vendor
CVE Published:
2 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-15206?

The SMS Alert WordPress plugin prior to version 3.9.8 exposes a critical flaw in its user authentication mechanism. An attacker can exploit the vulnerability by verifying an OTP sent to their own mobile device and subsequently supplying a different phone number to log in as any user. This potentially allows an unauthorized individual to gain access to user accounts, including those of administrators, that have their phone numbers stored for billing purposes. This flaw highlights significant risks in session management for applications using this plugin.

Affected Version(s)

SMS Alert 0 < 3.9.8

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-15206 - Proof of Concept

References

https://wpscan.com/vulnerability/d0bb4c41-392a-4209-9e44-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sai Praneeth Koti
WPScan
.