How severe is CVE-2021-27320?

CVE-2021-27320 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-27320 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27320?

CVE-2021-27320 affects Doctor Appointment System Project Doctor Appointment System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27320?

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-2021-27320 published?

CVE-2021-27320 was published on 2021-03-24 and last updated on 2026-06-17.

CVE-2021-27320

CVE-2021-27320 is a high-severity vulnerability in Doctor Appointment System Project Doctor Appointment System with a CVSS 3.x base score of 7.5. 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 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Doctor Appointment System Project Doctor Appointment System
Published: 2021-03-24
Last modified: 2026-06-17

Description

Blind SQL injection in contactus.php in Doctor Appointment System 1.0 allows an unauthenticated attacker to insert malicious SQL queries via firstname parameter.

Frequently asked questions

What is CVE-2021-27320?: Blind SQL injection in contactus.php in Doctor Appointment System 1.0 allows an unauthenticated attacker to insert malicious SQL queries via firstname parameter.
How severe is CVE-2021-27320?: CVE-2021-27320 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-27320 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27320?: CVE-2021-27320 affects Doctor Appointment System Project Doctor Appointment System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27320?: 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-2021-27320 published?: CVE-2021-27320 was published on 2021-03-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:doctor_appointment_system_project:doctor_appointment_system:1.0:*:*:*:*:*:*:*

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CVE-2021-27319 — High (CVSS 7.5): Blind SQL injection in contactus.php in Doctor Appointment System 1.0 allows an unauthenticated attacker to insert…
CVE-2021-27316 — High (CVSS 7.5): Blind SQL injection in contactus.php in doctor appointment system 1.0 allows an unauthenticated attacker to insert…
CVE-2021-27315 — High (CVSS 7.5): Blind SQL injection in contactus.php in Doctor Appointment System 1.0 allows an unauthenticated attacker to insert…

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