CVE-2026-7743: Online Classroom 1.0 SQL Injection Flaw

CVE-2026-7743 Overview

CVE-2026-7743 is a SQL injection vulnerability in CodeAstro Online Classroom 1.0. The flaw resides in an unspecified function within the /OnlineClassroom/studentdetails endpoint. Attackers can manipulate the deleteid parameter to inject arbitrary SQL statements against the backing database.

The issue is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component). Exploitation occurs over the network and requires only low-privilege access. The exploit details have been publicly disclosed, increasing the likelihood of opportunistic abuse against exposed installations.

Critical Impact

Authenticated remote attackers can manipulate the deleteid parameter on /OnlineClassroom/studentdetails to inject SQL, potentially exposing or modifying student records.

Affected Products

• CodeAstro Online Classroom 1.0
• Component: /OnlineClassroom/studentdetails
• Vulnerable parameter: deleteid

Discovery Timeline

• 2026-05-04 - CVE-2026-7743 published to NVD
• 2026-05-04 - Last updated in NVD database
• Public Disclosure - Exploit details disclosed via VulDB Vulnerability #360918 and GitHub Issue Discussion

Technical Details for CVE-2026-7743

Vulnerability Analysis

The vulnerability is a SQL injection flaw in the student management workflow of CodeAstro Online Classroom 1.0. The /OnlineClassroom/studentdetails endpoint accepts a deleteid argument intended to identify a student record for deletion. The application concatenates this argument into a SQL statement without proper parameterization or input validation.

An attacker who can reach the endpoint can supply crafted SQL syntax in the deleteid value. The injected payload is executed by the database engine in the application's security context. Depending on the underlying database privileges, an attacker may read, modify, or delete records in the classroom database.

The weakness maps to [CWE-74], reflecting improper neutralization of special elements passed to a downstream interpreter. Exploitation requires low privileges but no user interaction, and can be carried out remotely.

Root Cause

The root cause is the use of unsanitized user-controlled input in a SQL query. The deleteid parameter is interpolated directly into a query string instead of being bound as a parameter. Standard defenses such as prepared statements, parameterized queries, or strict input validation are absent in the affected handler.

Attack Vector

The attack vector is network-based against the application's HTTP interface. An authenticated user submits a request to /OnlineClassroom/studentdetails with a deleteid value containing SQL meta-characters such as single quotes, comment sequences, or UNION clauses. The malicious payload alters the query semantics, enabling data exfiltration or unauthorized modification.

The vulnerability is described in prose because no verified exploit code is published in trusted feeds. Refer to the VulDB Vulnerability #360918 entry and the GitHub Issue Discussion for additional technical context.

Detection Methods for CVE-2026-7743

Indicators of Compromise

• HTTP requests to /OnlineClassroom/studentdetails containing SQL meta-characters in the deleteid parameter, such as ', --, ;, UNION, or SELECT.
• Database errors or anomalous response sizes returned from the studentdetails endpoint during normal user sessions.
• Unexpected deletions, modifications, or enumerations of student records in application audit logs.

Detection Strategies

• Inspect web server and application logs for non-numeric or encoded values supplied to deleteid on the affected route.
• Deploy a web application firewall ruleset that flags SQL injection signatures targeting the /OnlineClassroom/studentdetails path.
• Correlate authenticated session activity with database query patterns to identify repeated or malformed delete operations.

Monitoring Recommendations

• Enable verbose query logging on the database backing CodeAstro Online Classroom and alert on syntax errors originating from the application user.
• Monitor authentication logs for low-privileged accounts issuing high volumes of requests against student management endpoints.
• Track outbound data volumes from the application server to detect potential bulk exfiltration through UNION-based injection.

How to Mitigate CVE-2026-7743

Immediate Actions Required

• Restrict access to the /OnlineClassroom/studentdetails endpoint to trusted networks until a fix is applied.
• Audit all accounts with access to the application and revoke unused or excessive privileges.
• Review database logs for evidence of prior exploitation, including unexpected record deletions or schema enumeration.

Patch Information

No vendor patch has been published in the referenced advisories at the time of CVE assignment. Operators should monitor CodeAstro Security Resources and the VulDB Vulnerability #360918 entry for updates. Until a fix is available, apply the workarounds below.

Workarounds

• Replace dynamic SQL construction in the studentdetails handler with parameterized queries or prepared statements that bind the deleteid value.
• Enforce server-side input validation that constrains deleteid to a strict numeric type before it reaches any database layer.
• Apply a web application firewall rule that rejects requests where deleteid contains characters outside the [0-9] range.
• Operate the database account used by the application with the minimum privileges required, denying schema and administrative operations.

# Example WAF rule concept (ModSecurity-style) to block non-numeric deleteid values
SecRule ARGS:deleteid "!@rx ^[0-9]+$" \
    "id:1007743,phase:2,deny,status:400,\
     msg:'CVE-2026-7743 - non-numeric deleteid blocked on /OnlineClassroom/studentdetails'"