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

published 2026-02-02 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-5330 , GHSA-jg68-vhv3-9r8f

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits: 0; none known

Magento-lts is a long-term support alternative to Magento Community Edition (CE). Prior to version 20.16.1, the admin url can be discovered without prior knowledge of it's location by exploiting the X-Original-Url header on some configurations. This issue has been patched in version 20.16.1.

Patch / fix

fixed in 3

packagist openmage/magento-lts 20.16.1
openmage magento 20.16.1
openmage openmage 20.16.1

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 9 mo ago (2026-02-04)

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
GitHub	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	openmage/magento-lts	<20.16.1	20.16.1

Affected products

OpenMage magento-lts

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

github.com /OpenMage/magento-lts/security/advisories/GHSA-jg68-vhv3-9r8f
web, vendor-advisory
hackerone.com /bugs?subject=openmage&report_id=3416312
web, permissions-required
nvd.nist.gov /vuln/detail/CVE-2026-25523
advisory
github.com /OpenMage/magento-lts
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary