CVE-2026-12956: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-wfw6-vjph-f3w6
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CVSS 5.3
CWE-862
Published
Advisory Summary

CVE-2026-12956 is a MODERATE (CVSS 5.3) security vulnerability vulnerability (CWE-862: Missing Authorization) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not perform an authorization check when an actor attempts to access a resource or perform an action.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-12956 at a Glance

CVE Identifier CVE-2026-12956
GHSA Identifier GHSA-wfw6-vjph-f3w6
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-862: Missing Authorization
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:N/I:L/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 None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-12956

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-2026-12956, 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. 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 WP Event Solution (Eventin) plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 4.1.22 via the create_item() handler for the /wp-json/eventin/v2/orders REST endpoint. The endpoint's create_item_permissions_check() function only verifies a wp_rest nonce (which is leaked to every visitor through the etn-public script's localized_data_obj on every frontend page) and accepts a user-supplied 'status' value in prepare_item_for_database() with no whitelist validation. This makes it possible for unauthenticated attackers to create etn-order posts with status='completed' that are counted as sold by etn_get_sold_tickets_by_event(); because the auto-cleanup wp_schedule_single_event() in create_item() only fires for status='pending' orders, the forged completed orders persist indefinitely and exhaust ticket inventory.

References

NVD — CVE-2026-12956 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12956
plugins.trac.wordpress.org/browser/wp-event-so... WEB
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L1325
plugins.trac.wordpress.org/browser/wp-event-so... WEB
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L413
plugins.trac.wordpress.org/browser/wp-event-so... WEB
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L733
plugins.trac.wordpress.org/browser/wp-event-so... WEB
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/helper.php#L4558
plugins.trac.wordpress.org/browser/wp-event-so... WEB
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/locale/vars.php#L35
plugins.trac.wordpress.org/changeset WEB
https://plugins.trac.wordpress.org/changeset?reponame=&old=3668637%40wp-event-solution&new=3668637%40wp-event-solution
www.wordfence.com/threat-intel/vulner... WEB
https://www.wordfence.com/threat-intel/vulnerabilities/id/5e87a9ac-e7c6-4622-b3e5-6e17e7664317?source=cve

Frequently Asked Questions

What is CVE-2026-12956?
CVE-2026-12956 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-862: Missing Authorization.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-12956?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-12956?
CVE-2026-12956 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2026-12956?
CVE-2026-12956 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2026-12956?
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-wfw6-vjph-f3w6",
  "modified" : "2026-09-09T03:30:46Z",
  "published" : "2026-09-09T03:30:46Z",
  "aliases" : [ "CVE-2026-12956" ],
  "details" : "The WP Event Solution (Eventin) plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 4.1.22 via the create_item() handler for the /wp-json/eventin/v2/orders REST endpoint. The endpoint's create_item_permissions_check() function only verifies a wp_rest nonce (which is leaked to every visitor through the etn-public script's localized_data_obj on every frontend page) and accepts a user-supplied 'status' value in prepare_item_for_database() with no whitelist validation. This makes it possible for unauthenticated attackers to create etn-order posts with status='completed' that are counted as sold by etn_get_sold_tickets_by_event(); because the auto-cleanup wp_schedule_single_event() in create_item() only fires for status='pending' orders, the forged completed orders persist indefinitely and exhaust ticket inventory.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-12956"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L1325"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L413"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L733"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/helper.php#L4558"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/locale/vars.php#L35"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/changeset?reponame=&old=3668637%40wp-event-solution&new=3668637%40wp-event-solution"
  }, {
    "type" : "WEB",
    "url" : "https://www.wordfence.com/threat-intel/vulnerabilities/id/5e87a9ac-e7c6-4622-b3e5-6e17e7664317?source=cve"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-09T03:17:22Z"
  }
}