lynn999 EthPress Plugin up to 2.3.5 on WordPress Signature Verification app/Login.php verify_login improper authentication

Summaryinfo

A vulnerability has been found in lynn999 EthPress Plugin up to 2.3.5 and classified as critical. The impacted element is the function verify_login of the file app/Login.php of the component Signature Verification. Performing a manipulation results in improper authentication. This vulnerability is identified as CVE-2026-19125. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in lynn999 EthPress Plugin up to 2.3.5. This affects the function verify_login of the file app/Login.php of the component Signature Verification. 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 EthPress – Web3 Login plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 2.3.5. This is due to the verify_login() function in app/Login.php containing a missing return statement in the signature verification failure branch — when Signature::verify2() reports a mismatch, the function only assigns a WP_Error to a local variable and continues executing, causing unconditional fall-through to the login block where Address::log_in() calls wp_set_auth_cookie() regardless of whether the submitted signature is valid. This makes it possible for unauthenticated attackers to log in as any WordPress user who has a linked wallet address — including administrators — by submitting that user's public wallet address alongside an arbitrary well-formed signature, enabling full site takeover.

It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-19125 since 08/06/2026. 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 of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/23/2026).

By approaching the search of inurl:app/Login.php it is possible to find vulnerable targets with Google Hacking.

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

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• lynn999

Name

• EthPress Plugin

Version

• 2.3.0
• 2.3.1
• 2.3.2
• 2.3.3
• 2.3.4
• 2.3.5

CPE 2.3info

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CPE 2.2info

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