CVE-2026-15660: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-q642-cfr5-5536
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CVSS 4.3
CWE-862
Published
Advisory Summary

CVE-2026-15660 is a MODERATE (CVSS 4.3) 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-2026-15660 at a Glance

CVE Identifier CVE-2026-15660
GHSA Identifier GHSA-q642-cfr5-5536
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-862: Missing Authorization
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2026-15660

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-2026-15660, 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 SEO Booster plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 7.4.7. This is due to a missing capability check on the handle_oauth_callback() function which is hooked to admin_init and processes $_GET['access_token'] and $_GET['google_email'] without verifying the caller's role. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the seobooster_access_token, seobooster_google_email, and seobooster_gsc_sites options and delete the seobooster_needs_reauth flag by visiting a crafted /wp-admin/ URL, disrupting the Google Search Console integration and injecting attacker-chosen data into site options via the attacker-supplied token that drives an outbound Google API request whose response is stored.

References

NVD — CVE-2026-15660 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15660
plugins.trac.wordpress.org/browser/seo-booster... WEB
https://plugins.trac.wordpress.org/browser/seo-booster/tags/7.3.2/seo-booster.php#L243
plugins.trac.wordpress.org/browser/seo-booster... WEB
https://plugins.trac.wordpress.org/browser/seo-booster/tags/7.3.2/seo-booster.php#L546
plugins.trac.wordpress.org/browser/seo-booster... WEB
https://plugins.trac.wordpress.org/browser/seo-booster/tags/7.3.2/seo-booster.php#L547
plugins.trac.wordpress.org/changeset WEB
https://plugins.trac.wordpress.org/changeset?reponame=&old=3665611%40seo-booster&new=3665611%40seo-booster
www.wordfence.com/threat-intel/vulner... WEB
https://www.wordfence.com/threat-intel/vulnerabilities/id/3fd58af7-e8ef-4518-bed8-4e20c8e61db7?source=cve

Frequently Asked Questions

What is CVE-2026-15660?
CVE-2026-15660 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-2026-15660?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-15660?
CVE-2026-15660 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2026-15660?
CVE-2026-15660 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-2026-15660?
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-q642-cfr5-5536",
  "modified" : "2026-09-19T03:32:02Z",
  "published" : "2026-09-19T03:32:02Z",
  "aliases" : [ "CVE-2026-15660" ],
  "details" : "The SEO Booster plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 7.4.7. This is due to a missing capability check on the handle_oauth_callback() function which is hooked to admin_init and processes $_GET['access_token'] and $_GET['google_email'] without verifying the caller's role. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the seobooster_access_token, seobooster_google_email, and seobooster_gsc_sites options and delete the seobooster_needs_reauth flag by visiting a crafted /wp-admin/ URL, disrupting the Google Search Console integration and injecting attacker-chosen data into site options via the attacker-supplied token that drives an outbound Google API request whose response is stored.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-15660"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/seo-booster/tags/7.3.2/seo-booster.php#L243"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/seo-booster/tags/7.3.2/seo-booster.php#L546"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/seo-booster/tags/7.3.2/seo-booster.php#L547"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/changeset?reponame=&old=3665611%40seo-booster&new=3665611%40seo-booster"
  }, {
    "type" : "WEB",
    "url" : "https://www.wordfence.com/threat-intel/vulnerabilities/id/3fd58af7-e8ef-4518-bed8-4e20c8e61db7?source=cve"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-19T03:17:13Z"
  }
}