CVE-2021-38833: SQL injection vulnerability in PHPGurukul Apartment Visitors Management System (AVMS) v

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-38833 is a critical-severity flaw (CVSS 9.8) affecting apartment visitors management system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL injection vulnerability in PHPGurukul Apartment Visitors Management System (AVMS) v. 1.0 allows attackers to execute arbitrary SQL statements and to gain RCE.

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	2.3% (top 17%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-09-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: apartment visitors 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

2021-09-13 19:15 UTCPublished CVE record published
2026-06-17 04:02 UTCUpdated Record last modified

apartment visitors management system project apartment visitors 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 apartment-visitors-management-system || rpm -q apartment-visitors-management-system || apartment-visitors-management-system --version

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

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

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

dnf --showduplicates list apartment-visitors-management-system sudo dnf downgrade apartment-visitors-management-system-<VERSION_BEFORE_1.0> sudo dnf versionlock add apartment-visitors-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-2021-38833?

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

Is CVE-2021-38833 being exploited?

CVE-2021-38833 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-2021-38833 affect?

CVE-2021-38833 affects apartment visitors management system. Severity is critical (CVSS 9.8). SQL injection vulnerability in PHPGurukul Apartment Visitors Management System (AVMS) v. 1.0 allows attackers to execute arbitrary SQL statements and to gain RCE.

How urgent is CVE-2021-38833?

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

Related CVEs

CVE-2025-7946 MEDIUM 4.3 DOWNGRADE A vulnerability was found in PHPGurukul Apartment Visitors Management System 1.0
CVE-2025-7858 LOW 3.5 DOWNGRADE A vulnerability classified as problematic has been found in PHPGurukul Apartment Visitors Management System 1.
CVE-2025-4699 HIGH 7.3 DOWNGRADE A vulnerability classified as critical was found in PHPGurukul Apartment Visitors Management System 1.0
CVE-2025-4554 HIGH 7.3 DOWNGRADE A vulnerability was found in PHPGurukul Apartment Visitors Management System 1.0
CVE-2025-4553 HIGH 7.3 DOWNGRADE A vulnerability was found in PHPGurukul Apartment Visitors Management System 1.0 and classified as critical

References

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