CVE-2021-41646

CRITICALNVD 9.89.8—

9.8

Remote Code Execution (RCE) vulnerability exists in Sourcecodester Online Reviewer System 1.0 by uploading a maliciously crafted PHP file that bypasses the image upload filters..

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 92.7%
KEV: Not listed

Published

October 29, 2021

Last Modified

April 14, 2026

Advisory Details (2)

Auto-updated May 18, 2026

🔬 Proof of concept available. No patch confirmed yet.

generic

CVE-2021-41646

https://www.nu11secur1ty.com/2021/12/cve-2021-41646.html

generic🟡 PoC Available

Online Reviewer System 1.0 - Remote Code Execution (RCE) (Unauthenticated) - PHP webapps Exploit

https://www.exploit-db.com/exploits/50319

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-434Unrestricted Upload of File with Dangerous Type

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
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2026-05-26 07:17 UTCepss_batch
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2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-41646?

CVE-2021-41646 is a critical vulnerability published on October 29, 2021. Remote Code Execution (RCE) vulnerability exists in Sourcecodester Online Reviewer System 1.0 by uploading a maliciously crafted PHP file that bypasses the image upload filters..

When was CVE-2021-41646 disclosed?

CVE-2021-41646 was first published in the National Vulnerability Database on October 29, 2021, with the most recent update on April 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-41646 actively exploited?

CVE-2021-41646 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 92.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-41646?

CVE-2021-41646 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-41646?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-41646, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-41646

📅 Published

🔄 Last Modified

📋 Advisory Details (2)

CVE-2021-41646

Online Reviewer System 1.0 - Remote Code Execution (RCE) (Unauthenticated) - PHP webapps Exploit

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-41646?

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Advisory Details (2)

Frequently asked(5)

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