Skip to content

Magento's X-Original-Url header can expose admin url

Moderate severity GitHub Reviewed Published Feb 2, 2026 in OpenMage/magento-lts • Updated Feb 5, 2026

Package

composer openmage/magento-lts (Composer)

Affected versions

< 20.16.1

Patched versions

20.16.1

Description

Impact

The admin url can be discovered without prior knowledge of its location by exploiting the X-Original-Url header on some configurations.

Patches

The bug comes from the Zend library.

Workarounds

Unset the X-Original-Url header in the web server configuration.

Resources

https://hackerone.com/bugs?subject=openmage&report_id=3416312

Upon deeper investigation, it was initially not found, but then it was realized that the search excluded the vendor/ directory. This is coming from the Zend_Controller module. Here is another tip from 2016 - it is surprising that this was not somehow patched already!

https://peterocallaghan.co.uk/2016/12/magento-poisoning-cache/ (dead link now..)

Credit

Anees Hyder (anees0x_dev) on HackerOne
https://hackerone.com/anees0x_dev/hacktivity?type=user

References

@colinmollenhour colinmollenhour published to OpenMage/magento-lts Feb 2, 2026
Published to the GitHub Advisory Database Feb 2, 2026
Reviewed Feb 2, 2026
Published by the National Vulnerability Database Feb 4, 2026
Last updated Feb 5, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(7th percentile)

Weaknesses

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. Learn more on MITRE.

CVE ID

CVE-2026-25523

GHSA ID

GHSA-jg68-vhv3-9r8f

Source code

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.