glboy OTP Login With Phone Number OTP Verification Plugin AJAX lwp_ajax_register improper authentication

Summaryinfo

A vulnerability has been found in glboy OTP Login With Phone Number OTP Verification Plugin up to 1.8.60 on WordPress and classified as critical. Affected by this vulnerability is the function lwp_ajax_register of the component AJAX Handler. Performing a manipulation results in improper authentication. This vulnerability is known as CVE-2026-3655. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in glboy OTP Login With Phone Number OTP Verification Plugin up to 1.8.60 on WordPress. It has been classified as critical. This affects the function lwp_ajax_register of the component AJAX Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published by lucky_buddy. The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-3655 since 03/06/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/29/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-33255). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• glboy

Name

• OTP Login With Phone Number OTP Verification Plugin

Version

• 1.8.0
• 1.8.1
• 1.8.2
• 1.8.3
• 1.8.4
• 1.8.5
• 1.8.6
• 1.8.7
• 1.8.8
• 1.8.9
• 1.8.10
• 1.8.11
• 1.8.12
• 1.8.13
• 1.8.14
• 1.8.15
• 1.8.16
• 1.8.17
• 1.8.18
• 1.8.19
• 1.8.20
• 1.8.21
• 1.8.22
• 1.8.23
• 1.8.24
• 1.8.25
• 1.8.26
• 1.8.27
• 1.8.28
• 1.8.29
• 1.8.30
• 1.8.31
• 1.8.32
• 1.8.33
• 1.8.34
• 1.8.35
• 1.8.36
• 1.8.37
• 1.8.38
• 1.8.39
• 1.8.40
• 1.8.41
• 1.8.42
• 1.8.43
• 1.8.44
• 1.8.45
• 1.8.46
• 1.8.47
• 1.8.48
• 1.8.49
• 1.8.50
• 1.8.51
• 1.8.52
• 1.8.53
• 1.8.54
• 1.8.55
• 1.8.56
• 1.8.57
• 1.8.58
• 1.8.59
• 1.8.60

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion