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CVE-2026-42458

Magento LTS: Reflected XSS - Import -> Data Flow (profiles)

5.3 MediumFix available

CVE-2026-42458 is a medium vulnerability (CVSS 5.3) in Openmage Magento-lts, published May 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 25th percentile. Fixed in openmage/magento-lts 20.18.0.

Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to 20.18.0, there is a reflected XSS vulnerability under admin panel -> System -> Import/Export -> Dataflow - Profiles. This vulnerability is fixed in 20.18.0.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
None

Exploit likelihood

0.32%Up 0.3 points since May 16, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

Magento LTS: Reflected XSS - Import -> Data Flow (profiles)

Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to 20.18.0, there is a reflected XSS vulnerability under admin panel -> System -> Import/Export -> Dataflow - Profiles. This vulnerability is fixed in 20.18.0.

Record
CVE-2026-42458
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-87
Updated
2026-11-02
EUVDEUVD-2026-30575 5.3

Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to 20.18.0, there is a reflected XSS vulnerability under admin panel -> System -> Import/Export -> Dataflow - Profiles. This vulnerability is fixed in 20.18.0.

Record
EUVD-2026-30575
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-x8jv-q8j2-487c 5.3

Magento LTS: Reflected XSS - Import -> Data Flow (profiles)

A reflected XSS vulnerability was found under admin panel -> System -> Import/Export -> Dataflow - Profiles.

Steps to produce

  • Login to the admin panel

  • Go to the path System -> Import/Export -> Dataflow - Profiles

  • Select profile direction as Import.

  • Click on Import Customers

  • Upload the file.

File Link: customer_20260212_204335.csv

  • Go back to Run profile.

  • Select the uploaded file and Click on Run in Popup.

  • One can see a URL like this

https://demo-admin.openmage.org/index.php/admin/system_convert_gui/run/id/6/key/40dbbb2e93f45f0463c57ff733352f4f/files/import-20260215151125-1_customer_20260212_204335.csv/

  • One can see the filename getting reflection in HTML tags.

  • Inject an HTML tag and observe.

https://demo-admin.openmage.org/index.php/admin/system_convert_gui/run/id/6/key/40dbbb2e93f45f0463c57ff733352f4f/files/"><h3>hacked</h3>/

<img width="1796" height="302" alt="image (3)" src="https://github.com/user-attachments/assets/502330b0-fa73-4b90-a81f-6216a98e474a" />

  • One can see the tag is getting executed.

  • Proceed for XSS.

https://demo-admin.openmage.org/index.php/admin/system_convert_gui/run/id/6/key/40dbbb2e93f45f0463c57ff733352f4f/files/%3CScRiPt%20%3Eprompt(document.cookie)%3C%2FScRiPt%3E

<img width="1670" height="562" alt="image (4)" src="https://github.com/user-attachments/assets/98a75081-fa8c-4483-9078-0ab5e7e14e4d" />

  • There is an XSS popup.

Impact

Cookie stealing, JS deface, many more

Record
GHSA-x8jv-q8j2-487c
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-87
Updated
2026-11-02
NVD 5.3

Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to 20.18.0, there is a reflected XSS vulnerability under admin panel -> System -> Import/Export -> Dataflow - Profiles. This vulnerability is fixed in 20.18.0.

Record
CVE-2026-42458
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-87
Updated
2026-11-02
OSV 5.3

Magento LTS: Reflected XSS - Import -> Data Flow (profiles)

Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to 20.18.0, there is a reflected XSS vulnerability under admin panel -> System -> Import/Export -> Dataflow - Profiles. This vulnerability is fixed in 20.18.0.

Record
CVE-2026-42458
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-87
Updated
2026-11-02
OSVGHSA-x8jv-q8j2-487c 5.3

Magento LTS: Reflected XSS - Import -> Data Flow (profiles)

A reflected XSS vulnerability was found under admin panel -> System -> Import/Export -> Dataflow - Profiles.

Steps to produce

  • Login to the admin panel

  • Go to the path System -> Import/Export -> Dataflow - Profiles

  • Select profile direction as Import.

  • Click on Import Customers

  • Upload the file.

File Link: customer_20260212_204335.csv

  • Go back to Run profile.

  • Select the uploaded file and Click on Run in Popup.

  • One can see a URL like this

https://demo-admin.openmage.org/index.php/admin/system_convert_gui/run/id/6/key/40dbbb2e93f45f0463c57ff733352f4f/files/import-20260215151125-1_customer_20260212_204335.csv/

  • One can see the filename getting reflection in HTML tags.

  • Inject an HTML tag and observe.

https://demo-admin.openmage.org/index.php/admin/system_convert_gui/run/id/6/key/40dbbb2e93f45f0463c57ff733352f4f/files/"><h3>hacked</h3>/

<img width="1796" height="302" alt="image (3)" src="https://github.com/user-attachments/assets/502330b0-fa73-4b90-a81f-6216a98e474a" />

  • One can see the tag is getting executed.

  • Proceed for XSS.

https://demo-admin.openmage.org/index.php/admin/system_convert_gui/run/id/6/key/40dbbb2e93f45f0463c57ff733352f4f/files/%3CScRiPt%20%3Eprompt(document.cookie)%3C%2FScRiPt%3E

<img width="1670" height="562" alt="image (4)" src="https://github.com/user-attachments/assets/98a75081-fa8c-4483-9078-0ab5e7e14e4d" />

  • There is an XSS popup.

Impact

Cookie stealing, JS deface, many more

Record
GHSA-x8jv-q8j2-487c
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-87
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openmage/magento-lts
Packagist
 through 20.17.0
20.18.0
openmage/magento-lts
Packagist
 before 20.18.0, plus listed versions
1.9.1.11.9.2.01.9.2.11.9.2.21.9.2.3
Show 45 moreShow less
1.9.2.41.9.3.01.9.3.1v19.4.0v19.4.1v19.4.10v19.4.11v19.4.12v19.4.13v19.4.14v19.4.15v19.4.16v19.4.17v19.4.18v19.4.19v19.4.2v19.4.20v19.4.21v19.4.22v19.4.23v19.4.3v19.4.4v19.4.5v19.4.6v19.4.7v19.4.8v19.4.9v19.5.0v19.5.0-rc1v19.5.0-rc2v19.5.0-rc3v19.5.0-rc4v19.5.0-rc5v19.5.1v19.5.2v19.5.3v20.0.0v20.0.1v20.0.10v20.0.11v20.0.12v20.0.13v20.0.14v20.0.15v20.0.16
20.18.0

History

History
WhenChangedSources
2026-11-02createdCVE List, EUVD, GitHub Advisories, NVD, OSV

References

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Left out here: 41 versions. The JSON record has them.

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