{"id":56090,"date":"2025-06-30T17:43:27","date_gmt":"2025-06-30T17:43:27","guid":{"rendered":""},"modified":"2025-09-15T06:48:59","modified_gmt":"2025-09-15T12:48:59","slug":"cve-2021-41691-sql-injection-vulnerability-in-os4ed-open-source-information-system-community","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2021-41691-sql-injection-vulnerability-in-os4ed-open-source-information-system-community\/","title":{"rendered":"CVE-2021-41691: SQL Injection Vulnerability in OS4Ed Open Source Information System Community<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

CVE-2021-41691 is a critical SQL injection vulnerability discovered in OS4Ed Open Source Information System Community version 8.0. This vulnerability may allow attackers to execute arbitrary SQL commands via a POST request to the \/TransferredOutModal.php endpoint, exploiting the “student_id” and “TRANSFER[SCHOOL]” parameters. Given its severity, this vulnerability has the potential to compromise system<\/a> security and result in data leakage if left unaddressed. It is crucial to understand the nature of this vulnerability, how it can be exploited, and the steps needed to mitigate the associated risks.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2021-41691
\nSeverity: Critical (CVSS: 9.8)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise and data<\/a> leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

OS4Ed Open Source Information System<\/a> Community | v8.0<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit works by an attacker sending a maliciously crafted POST request to the \/TransferredOutModal.php endpoint. This request includes manipulative SQL commands in the “student_id” and “TRANSFER[SCHOOL]” parameters. The application fails to properly sanitize the input, allowing the attacker’s SQL commands to be executed<\/a> directly on the database. This can potentially lead<\/a> to unauthorized data modification, data leakage, or even full system compromise.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here is a
\nconceptual<\/strong>
\n example of how the vulnerability might be exploited:<\/p>\n

POST \/TransferredOutModal.php HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nstudent_id=1; DROP TABLE users;--&TRANSFER[SCHOOL]='TestSchool'<\/code><\/pre>\n
In this example, the attacker inserts a SQL command to drop a table from the database<\/a>. This is a conceptual example and the actual attack payload would depend on the database structure and the attacker’s objectives.<\/p>\n
Mitigation<\/strong><\/p>\n
To mitigate this vulnerability<\/a>, it’s recommended to apply the vendor’s patch as soon as it’s available. In case the patch is not immediately available or can’t be immediately applied due to various reasons, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation. These systems can identify and block SQL injection<\/a> attempts, thus protecting the application until the patch can be applied.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview CVE-2021-41691 is a critical SQL injection vulnerability discovered in OS4Ed Open Source Information System Community version 8.0. This vulnerability may allow attackers to execute arbitrary SQL commands via a POST request to the \/TransferredOutModal.php endpoint, exploiting the “student_id” and “TRANSFER[SCHOOL]” parameters. Given its severity, this vulnerability has the potential to compromise system security and […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[74],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-56090","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-sql-injection"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t