CVE-2020-15243: Affected versions of Smartstore have a missing WebApi Authentication attribute

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CRITICAL 9.1REMOTEDOWNGRADE

CVE-2020-15243 is a critical-severity flaw (CVSS 9.1) affecting smartstore. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Affected versions of Smartstore have a missing WebApi Authentication attribute. This vulnerability affects Smartstore shops in version 4.0.0 & 4.0.1 which have installed and activated the Web API plugin. Users of Smartstore 4.0.0 and 4.0.1 must merge their repository with 4.0.x or overwrite the file SmartStore.Web.Framework in the */bin* directory of the deployed shop with this file. As a workaround without updating uninstall the Web API plugin t

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-287, CWE-306
Published	2020-10-08
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: smartstore

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

Am I affected?

Timeline

2020-10-08 23:15 UTCPublished CVE record published
2026-06-17 02:56 UTCUpdated Record last modified

smartstore smartstore DOWNGRADE

Affected: 4.0.0 · 4.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.0.0 (Debian / Ubuntu)

apt-cache madison smartstore sudo apt install smartstore=<VERSION_BEFORE_4.0.0> sudo apt-mark hold smartstore

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list smartstore sudo dnf downgrade smartstore-<VERSION_BEFORE_4.0.0> sudo dnf versionlock add smartstore

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-2020-15243?

smartstore: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-15243 being exploited?

CVE-2020-15243 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-2020-15243 affect?

CVE-2020-15243 affects smartstore. Severity is critical (CVSS 9.1). Affected versions of Smartstore have a missing WebApi Authentication attribute. This vulnerability affects Smartstore shops in version 4.0.0 & 4.0.1 which have installed and activated the Web API plugin. Users of Smartstore 4.0.0 and 4.0.1

How urgent is CVE-2020-15243?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-32608 CRITICAL 9.8 UPGRADE An issue was discovered in Smartstore (aka SmartStoreNET) through 4.1.1
CVE-2021-32607 CRITICAL 9.8 UPGRADE An issue was discovered in Smartstore (aka SmartStoreNET) through 4.1.1

References

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