CVE-2021-41691
BaseFortify
Publication date: 2025-06-24
Last updated on: 2025-07-09
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| os4ed | opensis | 8.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-89 | The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2021-41691 is an SQL injection vulnerability in the openSIS Student Information System version 8.0. It exists in the "student_id" and "TRANSFER[SCHOOL]" parameters of POST requests sent to the /TransferredOutModal.php page. An attacker can send specially crafted SQL injection payloads to these parameters, which could allow unauthorized access to all database tables and data within the system. [1]
How can this vulnerability impact me? :
This vulnerability can allow an attacker to gain unauthorized access to the entire database of the openSIS system, potentially exposing sensitive student, staff, and school data. This could lead to data breaches, loss of confidentiality, and unauthorized manipulation or disclosure of educational records. [1]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by sending specially crafted POST requests to the /TransferredOutModal.php page, targeting the "student_id" and "TRANSFER[SCHOOL]" parameters with SQL injection payloads. Since automated tools produced excessive false positives, manual or scripted testing with SQL injection payloads on these parameters is recommended. For example, using curl to test injection: curl -X POST -d "student_id=1' OR '1'='1&TRANSFER[SCHOOL]=test" https://your-opensis-domain/TransferredOutModal.php and observing if the response indicates SQL errors or unauthorized data access. [1]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include applying any available security updates or patches from the vendor once released. Until then, restrict access to the /TransferredOutModal.php endpoint to trusted users only, implement web application firewall (WAF) rules to block suspicious SQL injection payloads targeting the "student_id" and "TRANSFER[SCHOOL]" parameters, and monitor logs for unusual activity. Additionally, consider disabling or restricting the vulnerable functionality if possible to reduce exposure. [1]