How severe is CVE-2021-36622?

CVE-2021-36622 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-2021-36622 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2021-36622?

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-2021-36622 published?

CVE-2021-36622 was published on 2021-08-03 and last updated on 2026-06-17.

CVE-2021-36622

CVE-2021-36622 is a critical-severity vulnerability in Online Covid Vaccination Scheduler System Project Online Covid Vaccination Scheduler 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Online Covid Vaccination Scheduler System Project Online Covid Vaccination Scheduler System
Published: 2021-08-03
Last modified: 2026-06-17

Description

Sourcecodester Online Covid Vaccination Scheduler System 1.0 is affected vulnerable to Arbitrary File Upload. The admin panel has an upload function of profile photo accessible at http://localhost/scheduler/admin/?page=user. An attacker could upload a malicious file such as shell.php with the Content-Type: image/png. Then, the attacker have to visit the uploaded profile photo to access the shell.

Frequently asked questions

What is CVE-2021-36622?: Sourcecodester Online Covid Vaccination Scheduler System 1.0 is affected vulnerable to Arbitrary File Upload. The admin panel has an upload function of profile photo accessible at http://localhost/scheduler/admin/?page=user. An attacker could upload a malicious file such as shell.php with the Content-Type: image/png. Then, the attacker have to visit the uploaded profile photo to access the shell.
How severe is CVE-2021-36622?: CVE-2021-36622 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-2021-36622 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36622?: CVE-2021-36622 affects Online Covid Vaccination Scheduler System Project Online Covid Vaccination Scheduler System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36622?: 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-2021-36622 published?: CVE-2021-36622 was published on 2021-08-03 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/50114

Affected products (1)

cpe:2.3:a:online_covid_vaccination_scheduler_system_project:online_covid_vaccination_scheduler_system:1.0:*:*:*:*:*:*:*

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