CVE-2026-3655
OTP Login With Phone Number, OTP Verification <= 1.8.60 - Unauthenticated Authentication Bypass via Firebase OTP Verification
Description
The OTP Login With Phone Number, OTP Verification plugin for WordPress is vulnerable to authentication bypass in versions 1.8.50 through 1.8.60. This is due to the Firebase verification flow in the `lwp_ajax_register` AJAX handler not binding the Firebase session to the phone number supplied in the request. The `idehweb_lwp_activate_through_firebase()` function validates that a Firebase OTP session is legitimate, but the `phoneNumber` returned by Firebase is never compared against the victim's stored phone number. This makes it possible for unauthenticated attackers to authenticate as any user who has a phone number stored in user meta, including administrators, by verifying their own Firebase session and supplying the victim's phone number in the same request.
INFO
Published Date :
May 29, 2026, 8:16 a.m.
Last Modified :
May 29, 2026, 1:09 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update the OTP Login With Phone Number, OTP Verification plugin.
- Verify the Firebase verification flow logic.
- Ensure phone number binding is correctly implemented.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-3655.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-3655 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-3655
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-3655 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-3655 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
May. 29, 2026
Action Type Old Value New Value Added Description The OTP Login With Phone Number, OTP Verification plugin for WordPress is vulnerable to authentication bypass in versions 1.8.50 through 1.8.60. This is due to the Firebase verification flow in the `lwp_ajax_register` AJAX handler not binding the Firebase session to the phone number supplied in the request. The `idehweb_lwp_activate_through_firebase()` function validates that a Firebase OTP session is legitimate, but the `phoneNumber` returned by Firebase is never compared against the victim's stored phone number. This makes it possible for unauthenticated attackers to authenticate as any user who has a phone number stored in user meta, including administrators, by verifying their own Firebase session and supplying the victim's phone number in the same request. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-287 Added Reference https://plugins.trac.wordpress.org/browser/login-with-phone-number/tags/1.8.60/inc/ajax-handlers.php#L1167 Added Reference https://plugins.trac.wordpress.org/browser/login-with-phone-number/tags/1.8.60/inc/ajax-handlers.php#L649 Added Reference https://plugins.trac.wordpress.org/browser/login-with-phone-number/tags/1.8.60/inc/ajax-handlers.php#L659 Added Reference https://plugins.trac.wordpress.org/browser/login-with-phone-number/trunk/inc/ajax-handlers.php#L649 Added Reference https://plugins.trac.wordpress.org/changeset/3479314/login-with-phone-number/trunk/inc/ajax-handlers.php?old=3455810&old_path=login-with-phone-number%2Ftrunk%2Finc%2Fajax-handlers.php Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/7fc410f2-5f2b-4eea-a0fb-fe58f988f95f?source=cve