How severe is CVE-2021-40595?

CVE-2021-40595 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-40595 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40595?

CVE-2021-40595 affects Online Leave Management System Project Online Leave Management System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40595?

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

When was CVE-2021-40595 published?

CVE-2021-40595 was published on 2022-01-21 and last updated on 2026-06-17.

CVE-2021-40595

CVE-2021-40595 is a critical-severity vulnerability in Online Leave Management System Project Online Leave Management System with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Online Leave Management System Project Online Leave Management System
Published: 2022-01-21
Last modified: 2026-06-17

Description

SQL injection vulnerability in Sourcecodester Online Leave Management System v1 by oretnom23, allows attackers to execute arbitrary SQL commands via the username parameter to /leave_system/classes/Login.php.

Frequently asked questions

What is CVE-2021-40595?: SQL injection vulnerability in Sourcecodester Online Leave Management System v1 by oretnom23, allows attackers to execute arbitrary SQL commands via the username parameter to /leave_system/classes/Login.php.
How severe is CVE-2021-40595?: CVE-2021-40595 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-40595 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40595?: CVE-2021-40595 affects Online Leave Management System Project Online Leave Management System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40595?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-40595 published?: CVE-2021-40595 was published on 2022-01-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:online_leave_management_system_project:online_leave_management_system:1.0:*:*:*:*:*:*:*

More vulnerabilities in Online Leave Management System Project Online Leave Management System

CVE-2022-45009 — High (CVSS 7.2): Online Leave Management System v1.0 was discovered to contain an arbitrary file upload vulnerability at…
CVE-2022-43179 — High (CVSS 7.2): Online Leave Management System v1.0 was discovered to contain a SQL injection vulnerability via the component…
CVE-2022-41379 — High (CVSS 7.2): An arbitrary file upload vulnerability in the component /leave_system/classes/Users.php?f=save of Online Leave…
CVE-2022-41355 — High (CVSS 7.2): Online Leave Management System v1.0 was discovered to contain a SQL injection vulnerability via the id parameter at…
CVE-2022-40928 — High (CVSS 7.2): Online Leave Management System v1.0 is vulnerable to SQL Injection via…
CVE-2022-40927 — High (CVSS 7.2): Online Leave Management System v1.0 is vulnerable to SQL Injection via…

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