CVE-2026-57630

Blocksy Companion Pro <= 2.1.46 - Unauthenticated Insecure Direct Object Reference

2026-06-26 00:00

Strategic Overview

Status: Patched in 2.1.47
Affected Plugin: Blocksy Companion Pro
Affected Version: <= 2.1.46
CVSS: 5.3Medium
Weakness type: CWE-639 · Authorization Bypass Through User-Controlled Key
CVE: CVE-2026-57630

View all Blocksy Companion Pro vulnerabilities

At a glance

CVE-2026-57630 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the Blocksy Companion Pro WordPress plugin, affecting versions <= 2.1.46. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.1.47; sites on affected versions should update now. Disclosed June 2026, reported by Austin Ginder.

Vulnerability Overview

The Blocksy Companion Pro plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.1.46 due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to perform unauthorized actions.

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.

CWE-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in Blocksy Companion Pro <= 2.1.46 takes no account at all. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For Blocksy Companion Pro the fix is 2.1.47: builds <= 2.1.46 are affected, anything from 2.1.47 onward is not.

Remediation

Update to version 2.1.47, or a newer patched version

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. None of that substitutes for the fix: Blocksy Companion Pro 2.1.47 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-57630 https://www.wordfence.com/threat-intel/vulnerabilities/id/21dcb733-0477-46b3-a409-9823c03cbdca https://nvd.nist.gov/vuln/detail/CVE-2026-57630

Related records

Other vulnerabilities in Blocksy Companion Pro

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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