What is CVE-2021-41691?

CVE-2021-41691 is a critical-severity vulnerability in Os4ed Opensis, classified under SQL Injection. CVSS score: 9.8/10. Published 2025-06-24.

How severe is CVE-2021-41691?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-41691 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SQL Injection in Os4ed Opensis

CVE-2021-41691

A SQL injection vulnerability exists in OS4Ed Open Source Information System Community v8.0 via the "student_id" and "TRANSFER{SCHOOL]" parameters in POST request sent to /TransferredOutModal.php.

Vulnerability class: SQL Injection

EPSS: 0.017 (75.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Os4ed Opensis — versions 8.0
N/a — versions n/a

Weakness classification (CWE)

CWE-89 — SQL Injection

Public proof-of-concept exploits

References

cve@mitre.org (Product)
cve@mitre.org (Product)
cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2021-41691?: CVE-2021-41691 is a critical-severity vulnerability in Os4ed Opensis, classified under SQL Injection. CVSS score: 9.8/10. Published 2025-06-24.
How severe is CVE-2021-41691?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-41691 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.