CVE-2026-7742: CodeAstro Online Classroom SQLi Flaw

CVE-2026-7742 Overview

CVE-2026-7742 is a SQL injection vulnerability in CodeAstro Online Classroom 1.0. The flaw exists in an unspecified function within the /OnlineClassroom/facultylogin endpoint. Attackers can manipulate the fid parameter to inject arbitrary SQL statements into backend database queries. The vulnerability is exploitable remotely over the network and requires low privileges. A public exploit has been disclosed, increasing the likelihood of opportunistic attempts. The weakness is classified under CWE-74, covering improper neutralization of special elements in output used by downstream components.

Critical Impact
Remote attackers with low-level access can manipulate the fid parameter at /OnlineClassroom/facultylogin to execute arbitrary SQL queries against the application database.

Affected Products

CodeAstro Online Classroom 1.0
/OnlineClassroom/facultylogin endpoint
Backend database accessed via the fid parameter

Discovery Timeline

2026-05-04 - CVE-2026-7742 published to NVD
2026-05-04 - Last updated in NVD database

Technical Details for CVE-2026-7742

Vulnerability Analysis

The vulnerability resides in the faculty login workflow of CodeAstro Online Classroom 1.0. The application accepts the fid request parameter and incorporates it into a SQL statement without sufficient sanitization or parameterization. An attacker can supply crafted input containing SQL metacharacters and clauses to alter the intended query logic. Successful exploitation can disclose, modify, or destroy database records associated with faculty accounts and related course data. Because the endpoint is reachable over the network, no physical or local access is required. Public disclosure of exploit details lowers the barrier for adoption by low-skill attackers and automated scanners.

Root Cause

The root cause is improper neutralization of special elements within the fid argument before it is used in a database query. The application concatenates user-supplied data into SQL statements rather than using prepared statements or parameter binding. This is a classic injection pattern aligned with [CWE-74].

Attack Vector

Exploitation occurs over HTTP by issuing a crafted request to /OnlineClassroom/facultylogin with a malicious fid value. The attack is remote and requires low privileges according to the published vector. Typical payloads include boolean-based, error-based, or UNION-based SQL injection techniques used to enumerate schema, extract credentials, or bypass authentication. Refer to the VulDB Vulnerability ID #360917 and the GitHub Issue Tracker Discussion for technical context.

Detection Methods for CVE-2026-7742

Indicators of Compromise

HTTP requests to /OnlineClassroom/facultylogin containing SQL metacharacters such as ', ", --, UNION, SELECT, or OR 1=1 in the fid parameter.
Unusual database error messages or stack traces returned by the faculty login flow.
Unexpected authentication successes or new faculty session creations following malformed fid input.

Detection Strategies

Inspect web server and application logs for anomalous values of the fid parameter at the /OnlineClassroom/facultylogin path.
Deploy a web application firewall ruleset that flags SQL injection signatures targeting the faculty login endpoint.
Correlate spikes in 500-class HTTP errors with database engine errors referencing syntax failures.

Monitoring Recommendations

Enable verbose query logging on the database server and alert on syntactically suspicious statements originating from the application user.
Monitor outbound data volumes from the application tier for signs of bulk extraction following injection attempts.
Track failed faculty authentication patterns that include encoded SQL payloads.

How to Mitigate CVE-2026-7742

Immediate Actions Required

Restrict access to the /OnlineClassroom/facultylogin endpoint to trusted networks until a fix is deployed.
Apply a virtual patch through a web application firewall to block SQL metacharacters in the fid parameter.
Rotate database credentials and review faculty account integrity if exploitation is suspected.

Patch Information

No vendor advisory or official patch has been published in the references available at the time of NVD publication. Consult the CodeAstro Security Resource and the VulDB Submission ID #807694 for updates on fixes.

Workarounds

Implement parameterized queries or prepared statements for every database call that consumes the fid value.
Apply server-side input validation to enforce a strict type and length for fid, rejecting non-numeric input where applicable.
Run the application database account with least privilege so injection cannot reach administrative tables.

bash

# Configuration example: ModSecurity rule blocking SQLi patterns on the faculty login endpoint
SecRule REQUEST_URI "@beginsWith /OnlineClassroom/facultylogin" \
    "phase:2,chain,deny,status:403,id:1026077420,msg:'CVE-2026-7742 SQLi attempt on fid'"
    SecRule ARGS:fid "@detectSQLi" "t:none,t:urlDecodeUni"