CVE-2021-36621

Name: CVE-2021-36621
Creator: NVD / NIST
Published: 2021-07-30T14:15:18.2+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 2.07%

Last modified Jun 17, 2026

CVE-2021-36621 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. Sourcecodester Online Covid Vaccination Scheduler System 1.0 is vulnerable to SQL Injection. The username parameter is vulnerable to time-based SQL injection. EPSS estimates a 2.07% chance of exploitation in the next 30 days.

Description

Sourcecodester Online Covid Vaccination Scheduler System 1.0 is vulnerable to SQL Injection. The username parameter is vulnerable to time-based SQL injection. Upon successful dumping the admin password hash, an attacker can decrypt and obtain the plain-text password. Hence, the attacker could authenticate as Administrator.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.07%

79.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions
Online Covid Vaccination Scheduler System Project	Online Covid Vaccination Scheduler System	1.0

References

http://packetstormsecurity.com/files/164324/Covid-Vaccination-Scheduler-System-1.0-SQL-Injection-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/oretnom23/CVE-nu11-18-09-2821Exploit, Third Party Advisory
https://www.exploit-db.com/exploits/50109Exploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/164324/Covid-Vaccination-Scheduler-System-1.0-SQL-Injection-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/oretnom23/CVE-nu11-18-09-2821Exploit, Third Party Advisory
https://www.exploit-db.com/exploits/50109Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Jul 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-36621?

How severe is CVE-2021-36621?

CVE-2021-36621 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 2.07% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36621?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36621?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST