CVE-2020-21012: Sourcecodester Hotel and Lodge Management System 2.0 is vulnerable to unauthenticated SQL injection and can al

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-21012 is a critical-severity flaw (CVSS 9.8) affecting hotel and lodge management system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sourcecodester Hotel and Lodge Management System 2.0 is vulnerable to unauthenticated SQL injection and can allow remote attackers to execute arbitrary SQL commands via the email parameter to the edit page for Customer, Room, Currency, Room Booking Details, or Tax Details.

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	3.5% (top 11%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-10-01
Last modified	2026-10-22

Publisher (CNA): MITRE · Vendor: nikhil-bhalerao

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-10-01 19:15 UTCPublished CVE record published
2026-10-22 16:11 UTCUpdated Record last modified

nikhil-bhalerao hotel and lodge management system DOWNGRADE

Affected: 2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy hotel-and-lodge-management-system || rpm -q hotel-and-lodge-management-system || hotel-and-lodge-management-system --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison hotel-and-lodge-management-system sudo apt install hotel-and-lodge-management-system=<VERSION_BEFORE_2.0> sudo apt-mark hold hotel-and-lodge-management-system

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

dnf --showduplicates list hotel-and-lodge-management-system sudo dnf downgrade hotel-and-lodge-management-system-<VERSION_BEFORE_2.0> sudo dnf versionlock add hotel-and-lodge-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-2020-21012?

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

Is CVE-2020-21012 being exploited?

CVE-2020-21012 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-2020-21012 affect?

CVE-2020-21012 affects hotel and lodge management system. Severity is critical (CVSS 9.8). Sourcecodester Hotel and Lodge Management System 2.0 is vulnerable to unauthenticated SQL injection and can allow remote attackers to execute arbitrary SQL commands via the email parameter to the edit page for Customer, Room, Currency, Room

How urgent is CVE-2020-21012?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-11397 HIGH 7.3 DOWNGRADE A security flaw has been discovered in SourceCodester Hotel and Lodge Management System 1.0
CVE-2025-11398 MEDIUM 6.3 DOWNGRADE A weakness has been identified in SourceCodester Hotel and Lodge Management System 1.0
CVE-2025-11399 MEDIUM 6.3 DOWNGRADE A security vulnerability has been detected in SourceCodester Hotel and Lodge Management System 1.0
CVE-2025-11400 MEDIUM 6.3 DOWNGRADE A vulnerability was detected in SourceCodester Hotel and Lodge Management System 1.0
CVE-2025-11401 MEDIUM 6.3 DOWNGRADE A flaw has been found in SourceCodester Hotel and Lodge Management System 1.0

References

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