CVE-2026-15303

6Storage Rentals <= 2.27.0 - Unauthenticated Account Takeover via 'email' Parameter

2026-08-14 14:02
Afan

Strategic Overview

Status
Unpatched
Affected Plugin
6Storage Rentals
Affected Version
<= 2.27.0
CVSS
9.8Critical
Weakness type
CWE-287 · Improper Authentication
CVE
CVE-2026-15303
View all 6Storage Rentals vulnerabilities

At a glance

CVE-2026-15303 is a critical-severity Improper Authentication vulnerability in the 6Storage Rentals WordPress plugin, affecting versions <= 2.27.0. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed August 2026, reported by Afan.

Vulnerability Overview

The 6Storage Rentals plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.27.0. This is due to the six_storage_create_wp_user() AJAX handler being registered on wp_ajax_nopriv_six_storage_create_wp_user without any nonce, capability, credential, or ownership verification, while calling wp_set_current_user() and wp_set_auth_cookie() for any WordPress user resolved by the attacker-supplied email address. This makes it possible for unauthenticated attackers to log in as any existing WordPress user, including administrators, by submitting that user's email address.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-287: Improper Authentication

6Storage Rentals <= 2.27.0 carries this weakness at six_storage_create_wp_user(), and reaching it takes no account at all. Improper authentication means the mechanism that proves who a caller is can be satisfied without the secret it was supposed to require.

An attacker authenticates as another user — administrators included — without ever knowing a password, so password policies and login rate limits never come into play. No fixed build of this plugin is recorded for 6Storage Rentals yet, so installs running <= 2.27.0 stay exposed until the vendor ships one.

Remediation

No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-15303https://www.wordfence.com/threat-intel/vulnerabilities/id/94e987be-bdfc-4691-b250-2b7d7249df0ahttps://nvd.nist.gov/vuln/detail/CVE-2026-15303

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C