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CVE-2026-25524

Openmage Magento insecure deserialization

8.1 HIGHPublic exploitEPSS 0.71%
  1. Published20 Apr 2026

Description

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 version 20.17.0, PHP functions such as `getimagesize()`, `file_exists()`, and `is_readable()` can trigger deserialization when processing `phar://` stream wrapper paths. OpenMage LTS uses these functions with potentially controllable file paths during image validation and media handling. An attacker who can upload a malicious phar file (disguised as an image) and trigger one of these functions with a `phar://` path can achieve arbitrary code execution. Version 20.17.0 patches the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Openmage Magento< 20.17.0

Remediation

Fixed in
Openmage Magento≥ 20.17.0

References

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Frequently asked

Is CVE-2026-25524 being actively exploited?

CVE-2026-25524 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.71%.

How severe is CVE-2026-25524?

CVE-2026-25524 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.71% probability of exploitation.

Which products are affected by CVE-2026-25524?

Affected products include Openmage Magento.

How do I fix CVE-2026-25524?

Upgrade affected software to a fixed version, for example Openmage Magento 20.17.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.