How severe is CVE-2021-45835?

CVE-2021-45835 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-2021-45835 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45835?

CVE-2021-45835 affects Online Admission System Project Online Admissions System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45835?

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-2021-45835 published?

CVE-2021-45835 was published on 2022-03-18 and last updated on 2026-06-17.

CVE-2021-45835

CVE-2021-45835 is a critical-severity vulnerability in Online Admission System Project Online Admissions 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: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Online Admission System Project Online Admissions System
Published: 2022-03-18
Last modified: 2026-06-17

Description

The Online Admission System 1.0 allows an unauthenticated attacker to upload or transfer files of dangerous types to the application through documents.php, which may be used to execute malicious code or lead to code execution.

Frequently asked questions

What is CVE-2021-45835?: The Online Admission System 1.0 allows an unauthenticated attacker to upload or transfer files of dangerous types to the application through documents.php, which may be used to execute malicious code or lead to code execution.
How severe is CVE-2021-45835?: CVE-2021-45835 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-2021-45835 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45835?: CVE-2021-45835 affects Online Admission System Project Online Admissions System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45835?: 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-2021-45835 published?: CVE-2021-45835 was published on 2022-03-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:online_admission_system_project:online_admissions_system:1.0:*:*:*:*:*:*:*

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →