CVE-2021-36621

HIGH

Online Covid Vaccination Scheduler System 1.0 - SQL Injection via Username Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-36621. PoCs published by faisalfs10x.

AI-analyzed exploit summary This exploit demonstrates a time-based blind SQL injection vulnerability in the 'username' parameter of the Online Covid Vaccination Scheduler System 1.0 admin login. It uses sqlmap to dump the admin password hash, which can then be decrypted to obtain plain-text credentials.

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.

Exploits (1)

exploitdb WORKING POC
by faisalfs10x · textwebappsphp
https://www.exploit-db.com/exploits/50109

This exploit demonstrates a time-based blind SQL injection vulnerability in the 'username' parameter of the Online Covid Vaccination Scheduler System 1.0 admin login. It uses sqlmap to dump the admin password hash, which can then be decrypted to obtain plain-text credentials.

Classification
Working Poc 95%
Attack Type
Sqli
Complexity
Trivial
Reliability
Reliable
Target: Online Covid Vaccination Scheduler System 1.0
No auth needed
Prerequisites: Access to the admin login page · Valid PHPSESSID cookie
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://www.exploit-db.com/exploits/50109

Scores

CVSS v3 8.1
EPSS 0.0207
EPSS Percentile 79.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-89
Status published
Products (1)
online_covid_vaccination_scheduler_system_project/online_covid_vaccination_scheduler_system 1.0
Published Jul 30, 2021
Tracked Since Feb 18, 2026