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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.019 (79.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: +0.001
Affected products
- Os4ed Opensis — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- opensis.com/ (Product)
- github.com/OS4ED/openSIS-Classic/ (Product)
- resources.s4e.io/blog/opensis-student-information-system-0-day-vulnerability-cv… (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.