Attackers Target Unpatched CryptoPayment Gateway Flaw That Can Expose Wallet Credentials

Threat actors are attempting to exploit an unpatched maximum-severity security vulnerability in the CryptoPayment Gateway WordPress plugin, according to findings from Defused Cyber.

The vulnerability in question is CVE-2026-81648, which carries a CVSS score of 10.0. Successful exploitation of the flaw could permit unauthenticated users to delete arbitrary files on the server and extract sensitive data, including stored wallet credentials.

"The CryptoPayment Gateway WordPress plugin from 1.2.1 to 1.2.2 does not apply an authorization check on one of its AJAX endpoints, allowing unauthenticated users to invoke administrative operations, including deleting arbitrary files on the server, overwriting the payment gateway configuration and recovering stored wallet credentials in cleartext," according to a description of the flaw on the NIST National Vulnerability Database (NVD).

The vulnerability affects versions 1.2.1 through 1.2.2, which is the latest version. There are no known fixes for the flaw, according to WP Scan. As of August 28, 2026, the plugin has been closed on the WordPress Plugin Directory and is no longer available for download due to an unspecified "security issue."

Statistics show that the plugin has been collectively downloaded 1,845 times, including 20 downloads over the last seven days. It's unclear if it's actively installed on any WordPress sites.

"We are observing in-the-wild exploitation attempts against CVE-2026-81648, a critical (CVSS 10.0) flaw in the CryptoPayment Gateway for WordPress," Defused Cyber said in an X post. "The attacks we recorded came from infrastructure that markets themselves as 'Anonymous KYC-Free VPS Hosting.'"

In the absence of a fix, site owners are advised to remove the plugin, rotate wallet keys, and audit for any suspicious changes.