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CVE-2021-27320

38
FAUCET Score

CVE-2021-27320 describes a blind SQL injection vulnerability in the contactus.php component of Doctor Appointment System 1.0, allowing an unauthenticated attacker to inject malicious SQL queries through the 'firstname' parameter. This high-severity vulnerability (CVSS 7.5) has a low attack complexity and requires no user interaction, potentially leading to full confidentiality compromise. While not listed in CISA's KEV catalog, a Nuclei template exists for detection, and its high EPSS score suggests a significant likelihood of exploitation. There is currently no evidence of active exploitation, Metasploit modules, or public exploit code on ExploitDB, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:doctor_appointment_system_project:doctor_appointment_system:1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
9.30%
Probability of exploitation in next 30 days
EPSS Percentile
94.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Nuclei: CVE-2021-27320 · May 6, 2023
This CVE's current EPSS score of 0.0930 is in the 92nd percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/161642/Doctor-Appointment-System-1.0-Blind-SQL-Injection.html
ExploitThird Party AdvisoryVDB Entry
sourcecodester.com / php/14182/doctor-appointment-system.html
ProductThird Party Advisory