Security readout for executives and security teams
Plain-English summary
This CVE is a critical SQL injection issue in Sourcecodester Online Grading System 1.0. A remote, unauthenticated attacker may be able to manipulate database queries through the uname parameter, risking data theft, data modification, or service disruption.
Executive priority
Treat as urgent for any exposed deployment. The issue can affect the core database without login, and public exploit information exists. If the product is not deployed, priority drops to inventory confirmation.
Technical view
CVE-2021-31650 is CWE-89 SQL injection affecting the uname parameter in Sourcecodester Online Grading System 1.0. The CVSS 3.1 score is 9.8, reflecting network access, low complexity, no privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure appears limited to organizations running Sourcecodester Online Grading System 1.0, especially if reachable from the internet. The source bundle does not provide CPEs or broader affected-version data, so asset confirmation is essential.
Exploitation context
A public Exploit-DB reference exists, indicating public technical knowledge. The CVE is not listed as KEV in the provided bundle, and no cited source states active exploitation in the wild.
Researcher notes
The affected metadata in the bundle is sparse, listing vendor/product as n/a despite the CVE title and description naming Sourcecodester Online Grading System 1.0. Avoid assuming other versions or forks are affected without local testing or vendor evidence.
Mitigation direction
- Check Sourcecodester or project maintainer guidance for a fixed release or advisory.
- If no supported fix exists, retire, replace, or isolate affected deployments.
- Restrict public access to the grading system until remediation is confirmed.
- Review uname handling for parameterized database queries before restoring exposure.
Validation and detection
- Inventory deployments of Sourcecodester Online Grading System and confirm version 1.0 exposure.
- Review authentication or login code paths that process the uname parameter.
- Check application and database logs for SQL errors or suspicious uname input.
- Confirm whether any affected instance is internet-accessible.
- Verify compensating access controls are active until a fix is confirmed.
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.
CWE-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupDatabase 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-2021-31650 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.exploit-db.com/exploits/49493CVE 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.
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.