CVE-2020-7964: An issue was discovered in Mirumee Saleor 2.x before 2.9.1

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MEDIUM 5.3REMOTEUPGRADE

CVE-2020-7964 is a medium-severity flaw (CVSS 5.3) affecting saleor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Mirumee Saleor 2.x before 2.9.1. Incorrect access control in the checkoutCustomerAttach mutations allows attackers to attach their checkouts to any user ID and consequently leak user data (e.g., name, address, and previous orders of any other customer).

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-306
Published	2020-01-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mirumee

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-01-24 20:15 UTCPublished CVE record published
2026-06-17 03:25 UTCUpdated Record last modified

mirumee saleor UPGRADE

Affected: >= 2.0.0 and < 2.9.1

Fixed in: 2.9.1

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy saleor || rpm -q saleor || saleor --version

2. UPGRADE to 2.9.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade saleor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade saleor

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison saleor sudo apt install saleor=<VERSION_BEFORE_2.0.0> sudo apt-mark hold saleor

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list saleor sudo dnf downgrade saleor-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add saleor

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-7964?

saleor: upgrade to 2.9.1. Exact commands for each OS are on this page.

Is CVE-2020-7964 being exploited?

CVE-2020-7964 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-7964 affect?

CVE-2020-7964 affects saleor. Severity is medium (CVSS 5.3). An issue was discovered in Mirumee Saleor 2.x before 2.9.1. Incorrect access control in the checkoutCustomerAttach mutations allows attackers to attach their checkouts to any user ID and consequently leak user data (e.g., name, address, and

How urgent is CVE-2020-7964?

Priority 40/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-33756 HIGH 7.5 UPGRADE Saleor is an e-commerce platform
CVE-2026-35401 HIGH 7.5 UPGRADE Saleor is an e-commerce platform
CVE-2026-35407 MEDIUM 6.5 UPGRADE Saleor is an e-commerce platform
CVE-2026-39851 MEDIUM 4.3 UPGRADE Saleor is an e-commerce platform
CVE-2026-24136 HIGH 7.5 UPGRADE Saleor is an e-commerce platform

References

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