Security readout for executives and security teams
Plain-English summary
CVE-2021-28423 is an authenticated SQL injection issue in Teachers Record Management System versions 1.0 through 2.1. A logged-in remote user may be able to run database commands through specific subject, teacher, or search parameters. Sources do not provide CVSS scoring or a confirmed patch.
Executive priority
Treat as a priority if the application is deployed with sensitive teacher or school records. The business risk is unauthorized database access by authenticated users, with public exploit references but no confirmed active exploitation in the supplied sources.
Technical view
The CVE describes multiple SQL injection flaws in edit-subjects-detail.php, edit-teacher-detail.php, and search.php, using editid GET and searchdata POST parameters. The reported impact is arbitrary SQL command execution by authenticated remote users. Public exploit references exist, but the source bundle does not show CISA KEV listing or confirmed active exploitation.
Likely exposure
Exposure is limited to deployments of Teachers Record Management System 1.0 through 2.1, especially internet-accessible instances with user login access. The provided CVE metadata does not identify CPEs, hosting patterns, or broader downstream products.
Exploitation context
Public Exploit-DB, Packet Storm, and researcher references are listed, so defenders should assume technique details are publicly available. Active exploitation is not established by the provided sources, and the CVE is not marked KEV in the bundle.
Researcher notes
Evidence is sparse: no CVSS vector, CWE, CPE, or patch details are included. Focus validation on version confirmation, authentication boundaries, affected endpoints, and database query handling. Avoid assuming unauthenticated exposure unless local testing or vendor documentation proves it.
Mitigation direction
- Identify any Teachers Record Management System 1.0 through 2.1 deployments.
- Check PHPGurukul or project guidance for a fixed release or official mitigation.
- Restrict application access to trusted users and networks until fixed.
- Review affected PHP pages for parameterized database queries.
- Rotate database credentials if suspicious access or data exposure is found.
Validation and detection
- Inventory web roots and asset records for Teachers Record Management System.
- Confirm installed version is outside the affected 1.0 through 2.1 range.
- Review access logs for suspicious requests to the affected PHP pages.
- Verify database queries use safe parameter binding for the named parameters.
- Confirm no unexpected database changes occurred around suspicious application activity.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Database behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-28423 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://phpgurukul.com/teachers-record-management-system-using-php-and-mysql/CVE reference
- https://nhattruong.blog/2021/05/22/cve-2021-28423-teachers-record-management-system-1-0-searchdata-error-based-sql-injection-authenticated/CVE reference
- https://www.exploit-db.com/exploits/50018CVE reference
- https://packetstormsecurity.com/files/163172/Teachers-Record-Management-System-1.0-SQL-Injection.htmlCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.