CVE-2021-40309

HIGH

OpenSIS 8.0 - Authenticated SQL Injection via cp_id_miss_attn Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-40309. PoCs published by Eric Salario.

AI-analyzed exploit summary This exploit demonstrates a SQL injection vulnerability in OpenSIS Community 8.0 via the 'cp_id_miss_attn' parameter in TakeAttendance.php. The PoC includes a time-based SQLi payload to confirm the vulnerability.

Description

A SQL injection vulnerability exists in the Take Attendance functionality of OS4Ed's OpenSIS 8.0. allows an attacker to inject their own SQL query. The cp_id_miss_attn parameter from TakeAttendance.php is vulnerable to SQL injection. An attacker can make an authenticated HTTP request as a user with access to "Take Attendance" functionality to trigger this vulnerability.

Exploits (1)

exploitdb WORKING POC
by Eric Salario · textwebappsphp
https://www.exploit-db.com/exploits/50249

This exploit demonstrates a SQL injection vulnerability in OpenSIS Community 8.0 via the 'cp_id_miss_attn' parameter in TakeAttendance.php. The PoC includes a time-based SQLi payload to confirm the vulnerability.

Classification
Working Poc 90%
Attack Type
Sqli
Complexity
Trivial
Reliability
Reliable
Target: OpenSIS Community 8.0
Auth required
Prerequisites: Authenticated access to the 'Take Attendance' functionality
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Product, Third Party Advisory x_refsource_misc
https://github.com/OS4ED/openSIS-Classic
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://www.exploit-db.com/exploits/50249

Scores

CVSS v3 8.8
EPSS 0.0176
EPSS Percentile 75.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-89
Status published
Products (1)
os4ed/opensis 8.0
Published Sep 24, 2021
Tracked Since Feb 18, 2026