CVE-2026-25523: Openmage/magento lts Magento's X-Original-Url Header Can Expose Vulnerability

MODERATE
Advisory Identifier: GHSA-jg68-vhv3-9r8f
Share
CVSS 5.3
CWE-200
Published
Advisory Summary

CVE-2026-25523 is a MODERATE (CVSS 5.3) magento's x-original-url header can expose vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Openmage/magento lts libraries in the Packagist ecosystem. The issue involves magento's x-original-url header can expose admin url. Remediation is available by upgrading affected packages to version 20.16.1.

CVE-2026-25523 at a Glance

CVE Identifier CVE-2026-25523
GHSA Identifier GHSA-jg68-vhv3-9r8f
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Openmage/magento lts
Package Ecosystem Packagist
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:L/I:N/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 Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-25523

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

openmage/magento-lts fixed: 20.16.1 
Upgrade openmage/magento-lts to 20.16.1
Verify Direct and Transitive Dependencies

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

inspect dependencies for openmage/magento-lts

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-25523, inspect your project dependencies for Openmage/magento lts:

inspect dependencies for openmage/magento-lts

Analyze the terminal output to locate any version of Openmage/magento lts in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 20.16.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Openmage/magento lts, 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

### Impact The admin url can be discovered without prior knowledge of it's location by exploiting the X-Original-Url header on some configurations. ### Patches The bug comes from the Zend library and is patche by unsetting the header in the bootstrap process. ### Workarounds Unset the `X-Original-Url` header in the web server configuration. ### References The activation of these headers is coming from the Zend_Controller module. It appears this has been known to some degree since 2016 - https://peterocallaghan.co.uk/2016/12/magento-poisoning-cache/ (dead link now..) ### Credit Anees Hyder ( @anees0xdev ) via HackerOne https://hackerone.com/anees0x_dev/hacktivity

CVE-2026-25523 Affected Openmage/magento lts Versions

1 component(s)
Fixed Versions:
20.16.1
Product / Package Ecosystem Affected Versions Fixed Version
openmage/magento-lts
 Packagist
< 20.16.1
20.16.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/OpenMage/magento-lts/security/advisories/GHSA-jg68-vhv3-9r8f
NVD — CVE-2026-25523 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25523
Openmage/magento lts Source Repository REPOSITORY
https://github.com/OpenMage/magento-lts
hackerone.com/bugs WEB
https://hackerone.com/bugs?subject=openmage&report_id=3416312

Frequently Asked Questions

What is CVE-2026-25523?
CVE-2026-25523 is a security vulnerability in Openmage/magento lts involving Magento's X-Original-Url header can expose admin url under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Openmage/magento lts versions are affected?
Affected versions include releases prior to 20.16.1 across affected packages: openmage/magento-lts.
What version fixes CVE-2026-25523?
Upgrading to 20.16.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openmage/magento-lts affected?
Yes, openmage/magento-lts is affected in releases prior to 20.16.1. Upgrade your dependency to 20.16.1 or later.
What is the CVSS score of CVE-2026-25523?
CVE-2026-25523 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:L/I:N/A:N.
What CWE is associated with CVE-2026-25523?
CVE-2026-25523 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Packagist dependencies for CVE-2026-25523?
Run the dependency tree command: 'inspect dependencies for openmage/magento-lts'. 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-jg68-vhv3-9r8f",
  "modified" : "2026-02-10T19:58:15Z",
  "published" : "2026-02-02T23:12:57Z",
  "aliases" : [ "CVE-2026-25523" ],
  "summary" : "Magento's X-Original-Url header can expose admin url",
  "details" : "### Impact\n\nThe admin url can be discovered without prior knowledge of it's location by exploiting the X-Original-Url header on some configurations.\n\n### Patches\n\nThe bug comes from the Zend library and is patche by unsetting the header in the bootstrap process.\n\n### Workarounds\n\nUnset the `X-Original-Url` header in the web server configuration.\n\n### References\n\nThe activation of these headers is coming from the Zend_Controller module. It appears this has been known to some degree since 2016 -\nhttps://peterocallaghan.co.uk/2016/12/magento-poisoning-cache/ (dead link now..)\n\n### Credit\n\nAnees Hyder ( @anees0xdev ) via HackerOne\nhttps://hackerone.com/anees0x_dev/hacktivity",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "openmage/magento-lts"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "20.16.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/OpenMage/magento-lts/security/advisories/GHSA-jg68-vhv3-9r8f"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-25523"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/OpenMage/magento-lts"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/bugs?subject=openmage&report_id=3416312"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-02T23:12:57Z",
    "nvd_published_at" : "2026-02-04T22:15:59Z"
  }
}