CVE-2026-107645: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-w5h9-m5j6-5394
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CVSS 9.1
CWE-269
Published
Advisory Summary

CVE-2026-107645 is a CRITICAL (CVSS 9.1) security vulnerability vulnerability (CWE-269: Improper Privilege Management) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-107645 at a Glance

CVE Identifier CVE-2026-107645
GHSA Identifier GHSA-w5h9-m5j6-5394
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-269: Improper Privilege Management
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-107645

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-107645, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-269: Improper Privilege Management, where the product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

The Blocksy Companion plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 2.1.58 This is due to the implement_user_registration() AJAX handler explicitly disabling Dokan's vendor-registration nonce check (via add_filter('dokan_register_nonce_check', '__return_false')) and then trusting an attacker-supplied $_POST['role'] value when invoking wc_create_new_customer() and wc_set_customer_auth_cookie(). This makes it possible for unauthenticated attackers to elevate their privileges to a Dokan 'seller' (vendor) account — including sites where the Dokan vendor signup is explicitly turned off — and to be auto-authenticated into that account, which grants publishing capabilities beyond those of a normal customer.

References

NVD — CVE-2026-107645 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-107645
plugins.trac.wordpress.org/browser/blocksy-com... WEB
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.58/framework/features/account-auth.php#L181
plugins.trac.wordpress.org/browser/blocksy-com... WEB
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.58/framework/features/account-auth.php#L24
plugins.trac.wordpress.org/browser/blocksy-com... WEB
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.58/framework/features/account-auth.php#L241
plugins.trac.wordpress.org/changeset/3735192/b... WEB
https://plugins.trac.wordpress.org/changeset/3735192/blocksy-companion/tags/2.1.59/framework/features/account-auth.php?old=3723693&old_path=blocksy-companion%2Ftags%2F2.1.58%2Fframework%2Ffeatures%2Faccount-auth.php
www.wordfence.com/threat-intel/vulner... WEB
https://www.wordfence.com/threat-intel/vulnerabilities/id/7757f41d-c1f1-4df1-8048-b1c78a897548?source=cve

Frequently Asked Questions

What is CVE-2026-107645?
CVE-2026-107645 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-269: Improper Privilege Management.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-107645?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-107645?
CVE-2026-107645 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2026-107645?
CVE-2026-107645 is classified under CWE-269: Improper Privilege Management (The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.).
How can I check Maven dependencies for CVE-2026-107645?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-w5h9-m5j6-5394",
  "modified" : "2026-10-10T06:30:56Z",
  "published" : "2026-10-10T06:30:56Z",
  "aliases" : [ "CVE-2026-107645" ],
  "details" : "The Blocksy Companion plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 2.1.58 This is due to the implement_user_registration() AJAX handler explicitly disabling Dokan's vendor-registration nonce check (via add_filter('dokan_register_nonce_check', '__return_false')) and then trusting an attacker-supplied $_POST['role'] value when invoking wc_create_new_customer() and wc_set_customer_auth_cookie(). This makes it possible for unauthenticated attackers to elevate their privileges to a Dokan 'seller' (vendor) account — including sites where the Dokan vendor signup is explicitly turned off — and to be auto-authenticated into that account, which grants publishing capabilities beyond those of a normal customer.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-107645"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.58/framework/features/account-auth.php#L181"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.58/framework/features/account-auth.php#L24"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.58/framework/features/account-auth.php#L241"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/changeset/3735192/blocksy-companion/tags/2.1.59/framework/features/account-auth.php?old=3723693&old_path=blocksy-companion%2Ftags%2F2.1.58%2Fframework%2Ffeatures%2Faccount-auth.php"
  }, {
    "type" : "WEB",
    "url" : "https://www.wordfence.com/threat-intel/vulnerabilities/id/7757f41d-c1f1-4df1-8048-b1c78a897548?source=cve"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-269" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-10T04:18:10Z"
  }
}