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CVE-2021-43510

45
FAUCET Score

CVE-2021-43510 is a critical SQL Injection vulnerability affecting Sourcecodester Simple Client Management System version 1.0, specifically through the username field in login.php. This vulnerability carries a CVSS v3.1 score of 9.8, indicating a severe risk with a network-based attack vector, low complexity, and high potential for confidentiality, integrity, and availability compromise. While not currently listed on the CISA KEV catalog, a Nuclei template exists for exploitation, and its high EPSS score suggests a significant likelihood of future exploitation. Despite its severity, there is currently no evidence of active exploitation, Metasploit modules, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:simple_client_management_system_project:simple_client_management_system:1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
7.51%
Probability of exploitation in next 30 days
EPSS Percentile
93.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-43510 · Oct 6, 2022
This CVE's current EPSS score of 0.0751 is in the 89th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / r4hn1/Simple-Client-Management-System-Exploit/blob/main/CVE-2021-43510
ExploitThird Party Advisory
r4hn1.medium.com / journey-to-first-two-cve-by-rahul-kalnarayan-307e2e87ee26
ExploitThird Party Advisory