CVE-2021-42668Public exploitNetwork attack vector

Database disclosure via injectable classmates identifier

Published Nov 5, 2021 · Updated Aug 4, 2024

SQL injection in SourceCodester Engineers Online Portal allows remote attackers to read database data through my_classmates.php. The page incorporates the id query parameter into a database query without neutralizing SQL syntax, allowing a crafted UNION SELECT to return the MySQL server version. No authentication or user interaction is required; the demonstrated consequence is database disclosure, and the CVE record reports server-side code execution in some cases.

CVSS severity9.8
Critical
EPSS probability4.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in SourceCodester Engineers Online Portal allows remote attackers to read database data through my_classmates.php. The page incorporates the id query parameter into a database query without neutralizing SQL syntax, allowing a crafted UNION SELECT to return the MySQL server version. No authentication or user interaction is required; the demonstrated consequence is database disclosure, and the CVE record reports server-side code execution in some cases.

The record

CVE
CVE-2021-42668
Published
Nov 5, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-89, CAPEC-66, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CAPEC-66SQL Injection
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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