CVE-2020-28133: An issue was discovered in SourceCodester Simple Grocery Store Sales And Inventory System 1.0

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-28133 is a critical-severity flaw (CVSS 9.8) affecting simple grocery store sales and inventory system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in SourceCodester Simple Grocery Store Sales And Inventory System 1.0. There was authentication bypass in web login functionality allows an attacker to gain client privileges via SQL injection in sales_inventory/login.php.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-89
Published	2020-11-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: simple grocery store sales and inventory sales project

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

Am I affected?

Timeline

2020-11-17 20:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

simple grocery store sales and inventory sales project simple grocery store sales and inventory system DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy simple-grocery-store-sales-and-inventory-system || rpm -q simple-grocery-store-sales-and-inventory-system || simple-grocery-store-sales-and-inventory-system --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison simple-grocery-store-sales-and-inventory-system sudo apt install simple-grocery-store-sales-and-inventory-system=<VERSION_BEFORE_1.0> sudo apt-mark hold simple-grocery-store-sales-and-inventory-system

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

dnf --showduplicates list simple-grocery-store-sales-and-inventory-system sudo dnf downgrade simple-grocery-store-sales-and-inventory-system-<VERSION_BEFORE_1.0> sudo dnf versionlock add simple-grocery-store-sales-and-inventory-system

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-2020-28133?

simple grocery store sales and inventory system: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-28133 being exploited?

CVE-2020-28133 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-2020-28133 affect?

CVE-2020-28133 affects simple grocery store sales and inventory system. Severity is critical (CVSS 9.8). An issue was discovered in SourceCodester Simple Grocery Store Sales And Inventory System 1.0. There was authentication bypass in web login functionality allows an attacker to gain client privileges via SQL injection in sales_inventory/logi

How urgent is CVE-2020-28133?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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