How severe is CVE-2021-42666?

CVE-2021-42666 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-42666 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42666?

CVE-2021-42666 affects Engineers Online Portal Project Engineers Online Portal. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42666?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-42666 published?

CVE-2021-42666 was published on 2021-11-05 and last updated on 2026-06-17.

CVE-2021-42666

CVE-2021-42666 is a high-severity vulnerability in Engineers Online Portal Project Engineers Online Portal with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Engineers Online Portal Project Engineers Online Portal
Published: 2021-11-05
Last modified: 2026-06-17

Description

A SQL Injection vulnerability exists in Sourcecodester Engineers Online Portal in PHP via the id parameter to quiz_question.php, which could let a malicious user extract sensitive data from the web server and in some cases use this vulnerability in order to get a remote code execution on the remote web server.

Frequently asked questions

What is CVE-2021-42666?: A SQL Injection vulnerability exists in Sourcecodester Engineers Online Portal in PHP via the id parameter to quiz_question.php, which could let a malicious user extract sensitive data from the web server and in some cases use this vulnerability in order to get a remote code execution on the remote web server.
How severe is CVE-2021-42666?: CVE-2021-42666 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-42666 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42666?: CVE-2021-42666 affects Engineers Online Portal Project Engineers Online Portal. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42666?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-42666 published?: CVE-2021-42666 was published on 2021-11-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:engineers_online_portal_project:engineers_online_portal:1.0:*:*:*:*:*:*:*

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