How severe is CVE-2020-9664?

CVE-2020-9664 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2020-9664?

CVE-2020-9664 affects the following packages: magento/core (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2020-9664?

The records we use list no patched version of magento/core for CVE-2020-9664. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

How do I detect CVE-2020-9664 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for magento/core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2020-9664 if there is no patch (or I can't update yet)?

Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Is CVE-2020-9664 actively exploited in the wild?

No public exploit code has been indexed for CVE-2020-9664 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2020-9664?

CVE-2020-9664 has an EPSS (Exploit Prediction Scoring System) score of 8.4%, placing it in the 95th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2020-9664?

CVE-2020-9664 is classified as Deserialization of Untrusted Data (CWE-502). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2020-9664 published, and has it been updated?

CVE-2020-9664 was published on May 24, 2022 and was last updated on January 11, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘

🐘 Packagist

Not in CISA KEV

CRITICAL severity

CVE-2020-9664 — core

CRITICAL

CVE-2020-9664 is a critical-severity (CVSS 9.8) Deserialization of Untrusted Data vulnerability in magento/core. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Magento php object injection vulnerability

Published

May 24, 2022

Updated

Jan 11, 2024

Affected

1 pkg

Patched

See advisory

Exploits

None indexed

Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

8.4%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs95th percentile — riskier than 95% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

🐘magento/core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Magento versions 1.14.4.5 and earlier, and 1.9.4.5 and earlier have a php object injection vulnerability. Successful exploitation could lead to arbitrary code execution. A patch SUPEE-11346 is available at Magento Open Source Download Page > Release Archive Tab > Magento Open Source Patches - 1.x Section

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`magento/core`	all versions	No fix

Affected Products

1 product · 2 configurations

Application

magentomagento

≤ 1.14.4.5

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for magento/core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of magento/core for CVE-2020-9664. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Frequently Asked Questions

Magento versions 1.14.4.5 and earlier, and 1.9.4.5 and earlier have a php object injection vulnerability. Successful exploitation could lead to arbitrary code execution. A patch SUPEE-11346 is available at [Magento Open Source Download Page](https://github.com/m-a-org/magento-patches) > Release Archive Tab > Magento Open Source Patches - 1.x Section

O3 Security · Impact-Aware SCA

Is CVE-2020-9664 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

9.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE Classification

CWE-502Deserialization of Untrusted Data

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

May 24, 2022

Last updated

Jan 11, 2024

Identifiers

CVE-2020-9664

References

Advisorynvd.nist.gov · CVE 2020 9664 Webhelpx.adobe.com · apsb20 41

Related vulnerabilities

This CVE is critical severity; 5 of 8 other CVEs affecting magento/core are rated as high or higher (top: critical).

CVE-2020-9581CVE-2020-9584CVE-2020-9576CVE-2020-9585CVE-2020-9630CVE-2020-9577CVE-2020-9632CVE-2020-9578

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedJan 11, 2024

CVE-2020-9664 — core

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Remediation status

Mitigate without a patch

Frequently Asked Questions

Is CVE-2020-9664 in your dependencies?