CVE-2026-15348: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-x4pq-v9hh-jm27
CVSS 6.3
CWE-287
Published
Advisory Summary

CVE-2026-15348 is a MODERATE (CVSS 6.3) security vulnerability vulnerability (CWE-287: Improper Authentication) affecting Software libraries in the Maven ecosystem. The weakness occurs when when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-15348 at a Glance

CVE Identifier CVE-2026-15348
GHSA Identifier GHSA-x4pq-v9hh-jm27
Severity MODERATE
CVSS v3.1 Base Score 6.3
CWE Classification CWE-287: Improper Authentication
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.3

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:L/I:L/A:L).

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 Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-15348

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-2026-15348, 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-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. 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 Premium Packages – Sell Digital Products Securely plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 7.0.4 via the `wpdmppdl` parameter. This is due to the `download()` function — hooked to the unauthenticated WordPress `wp` action — decoding the attacker-controlled `wpdmppdl` parameter using only `base64_decode()` and `json_decode()` with no HMAC, cryptographic signature, or nonce verification, and then issuing WordPress authentication cookies after a domain check that is trivially bypassed because both sides of the comparison are attacker-supplied values. This makes it possible for unauthenticated attackers to authenticate as any non-administrator WordPress user, including subscribers, customers, contributors, authors, editors, and shop managers, who owns an order, gaining full session-level access to that account.

References

NVD — CVE-2026-15348 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15348
plugins.trac.wordpress.org/browser/wpdm-premiu... WEB
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/includes/libs/functions.php#L1811
plugins.trac.wordpress.org/browser/wpdm-premiu... WEB
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L119
plugins.trac.wordpress.org/browser/wpdm-premiu... WEB
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L585
plugins.trac.wordpress.org/browser/wpdm-premiu... WEB
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L632
plugins.trac.wordpress.org/browser/wpdm-premiu... WEB
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L637
plugins.trac.wordpress.org/browser/wpdm-premiu... WEB
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/includes/libs/functions.php#L1811
plugins.trac.wordpress.org/browser/wpdm-premiu... WEB
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L119
plugins.trac.wordpress.org/browser/wpdm-premiu... WEB
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L585
plugins.trac.wordpress.org/browser/wpdm-premiu... WEB
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L632
plugins.trac.wordpress.org/browser/wpdm-premiu... WEB
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L637
plugins.trac.wordpress.org/changeset WEB
https://plugins.trac.wordpress.org/changeset?reponame=&old=3611573%40wpdm-premium-packages&new=3611573%40wpdm-premium-packages
www.wordfence.com/threat-intel/vulner... WEB
https://www.wordfence.com/threat-intel/vulnerabilities/id/0183866d-1eab-4982-b62e-77751c7e738c?source=cve

Frequently Asked Questions

What is CVE-2026-15348?
CVE-2026-15348 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-287: Improper Authentication.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-15348?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-15348?
CVE-2026-15348 has a CVSS v3.1 base score of 6.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-15348?
CVE-2026-15348 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check Maven dependencies for CVE-2026-15348?
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
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-x4pq-v9hh-jm27",
  "modified" : "2026-07-23T12:32:22Z",
  "published" : "2026-07-23T12:32:21Z",
  "aliases" : [ "CVE-2026-15348" ],
  "details" : "The Premium Packages – Sell Digital Products Securely plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 7.0.4 via the `wpdmppdl` parameter. This is due to the `download()` function — hooked to the unauthenticated WordPress `wp` action — decoding the attacker-controlled `wpdmppdl` parameter using only `base64_decode()` and `json_decode()` with no HMAC, cryptographic signature, or nonce verification, and then issuing WordPress authentication cookies after a domain check that is trivially bypassed because both sides of the comparison are attacker-supplied values. This makes it possible for unauthenticated attackers to authenticate as any non-administrator WordPress user, including subscribers, customers, contributors, authors, editors, and shop managers, who owns an order, gaining full session-level access to that account.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-15348"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/includes/libs/functions.php#L1811"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L119"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L585"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L632"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L637"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/includes/libs/functions.php#L1811"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L119"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L585"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L632"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L637"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/changeset?reponame=&old=3611573%40wpdm-premium-packages&new=3611573%40wpdm-premium-packages"
  }, {
    "type" : "WEB",
    "url" : "https://www.wordfence.com/threat-intel/vulnerabilities/id/0183866d-1eab-4982-b62e-77751c7e738c?source=cve"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-23T10:16:50Z"
  }
}