CVE-2020-28073: SourceCodester Library Management System 1.0 is affected by SQL Injection allowing an attacker to bypass the u

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-28073 is a critical-severity flaw (CVSS 9.8) affecting library management system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SourceCodester Library Management System 1.0 is affected by SQL Injection allowing an attacker to bypass the user authentication and impersonate any user on the system.

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	2.8% (top 14%)
CISA exploited list	No
Weakness	CWE-89
Published	2020-12-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: library management system project

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

Am I affected?

Timeline

2020-12-23 18:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

library management system project library management 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 library-management-system || rpm -q library-management-system || library-management-system --version

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

apt-cache madison library-management-system sudo apt install library-management-system=<VERSION_BEFORE_1.0> sudo apt-mark hold library-management-system

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

dnf --showduplicates list library-management-system sudo dnf downgrade library-management-system-<VERSION_BEFORE_1.0> sudo dnf versionlock add library-management-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-2020-28073?

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

Is CVE-2020-28073 being exploited?

CVE-2020-28073 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-2020-28073 affect?

CVE-2020-28073 affects library management system. Severity is critical (CVSS 9.8). SourceCodester Library Management System 1.0 is affected by SQL Injection allowing an attacker to bypass the user authentication and impersonate any user on the system.

How urgent is CVE-2020-28073?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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