Authentication bypass in SMS Alert WordPress plugin via OTP login
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-287.
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 (CWE-287). An unauthenticated remote attacker can sign in as any user with a stored phone number, including an administrator, by completing a code challenge on a phone they control. A public exploit is linked in the references.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | SMS Alert | 4.0.0 to before 4.0.1 | 4.0.1 | Patch available | CNA |
- SMS Alert VendorUnknown Affected 4.0.0 to before 4.0.1 Fixed in 4.0.1 Patch available CNA
Remediation
Update SMS Alert to version 4.0.1, which fixes the flaw.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA SMS Alert (Unknown) Fixed in 4.0.1
Timeline
- 2026-10-10 Threatist record created from CVE-2026-94256
- 2026-10-10 Alias added: GHSA-64w6-p26h-qxq4
- 2026-10-11 CVSS score added · CISA ADP
- 2026-10-11 Weakness changed · CISA ADP
- 2026-10-11 CISA SSVC decision points changed
- 2026-10-11 Priority changed: LOW → MEDIUM
References
Sources
- CVE-2026-94256 · CVE Program
- CVE-2026-94256 · NVD
- FIRST EPSS
- GHSA-64w6-p26h-qxq4 · GitHub Advisory Database · CC BY 4.0
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