CVE-2021-43420: SQL injection vulnerability in Login.php in Sourcecodester Online Payment Hub v1 by oretnom23, allows attacker

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-43420 is a critical-severity flaw (CVSS 9.8) affecting online payment hub. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL injection vulnerability in Login.php in Sourcecodester Online Payment Hub v1 by oretnom23, allows attackers to execute arbitrary SQL commands via the username parameter.

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	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-89
Published	2022-01-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: online payment hub project

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

Am I affected?

Timeline

2022-01-24 19:15 UTCPublished CVE record published
2026-06-17 04:10 UTCUpdated Record last modified

online payment hub project online payment hub 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 online-payment-hub || rpm -q online-payment-hub || online-payment-hub --version

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

apt-cache madison online-payment-hub sudo apt install online-payment-hub=<VERSION_BEFORE_1.0> sudo apt-mark hold online-payment-hub

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

dnf --showduplicates list online-payment-hub sudo dnf downgrade online-payment-hub-<VERSION_BEFORE_1.0> sudo dnf versionlock add online-payment-hub

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-2021-43420?

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

Is CVE-2021-43420 being exploited?

CVE-2021-43420 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-2021-43420 affect?

CVE-2021-43420 affects online payment hub. Severity is critical (CVSS 9.8). SQL injection vulnerability in Login.php in Sourcecodester Online Payment Hub v1 by oretnom23, allows attackers to execute arbitrary SQL commands via the username parameter.

How urgent is CVE-2021-43420?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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