CVE-2026-94256 SMS Alert CVE debrief

Who should care

Defenders responsible for WordPress installations with the SMS Alert plugin should assess exposure and prioritize verification of authentication and phone number verification controls.

Why it matters

The unauthenticated authentication bypass vulnerability in SMS Alert 4.0.0 allows attackers to sign in as any user, including administrators, and potentially modify plugin settings or access sensitive data. Defenders should prioritize verifying exposure and assessing compensating controls for authentication and phone number verification.

• Unauthenticated attackers can bypass authentication and sign in as any user with a stored phone number
• Attackers can sign in as administrators and potentially modify plugin settings or access sensitive data
• Verification of exposure and compensating controls is necessary to prevent exploitation

Technical summary

The SMS Alert WordPress plugin before 4.0.1 does not verify that the account being logged in is the one the verified one-time code belongs to, allowing unauthenticated attackers to sign in as any user with a stored phone number, including an administrator, by completing a code challenge on a phone they control. This vulnerability allows attackers to bypass authentication and potentially modify plugin settings or access sensitive data. The vulnerability is caused by a lack of verification of the account being logged in, and defenders should prioritize verifying exposure and assessing compensating controls for authentication and phone number verification.

Defensive priority

Defenders should prioritize verifying exposure of SMS Alert versions 4.0.0 and assessing compensating controls for authentication and phone number verification.

Recommended defensive actions

• Verify exposure of SMS Alert versions 4.0.0
• Assess compensating controls for authentication and phone number verification
• Implement monitoring for suspicious login attempts
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details on the unauthenticated authentication bypass vulnerability in SMS Alert 4.0.0. The source reference from WPScan provides additional technical description and exploit information.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.