CVE-2021-41691

critical · 9.8

A public exploit / detection template exists

Weaponised detection is publicly available, which meaningfully raises real-world risk regardless of CVSS. nuclei-templates →

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.

9.8

CVSS

1.9%

EPSS (exploit prob.)

78th

EPSS percentile

2025-06-24

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-89

Affected products

Vendor	Product	Affected versions
os4ed	opensis	8.0

Check a specific version with /api/v1/cve/match.

References

https://github.com/OS4ED/openSIS-Classic/
https://opensis.com/
https://resources.s4e.io/blog/opensis-student-information-system-0-day-vulnerability-cve-2021-41691/

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2021-41691