What’s Vulnerable › Vulnerabilities

CVE-2021-24223: N5 Upload Form <= 1.0 - Unauthenticated Arbitrary File Upload to RCE

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-12 · updated 2026-06-17
• Weakness: CWE-434

Description

The N5 Upload Form WordPress plugin through 1.0 suffers from an arbitrary file upload issue in page where a Form from the plugin is embed, as any file can be uploaded. The uploaded filename might be hard to guess as it's generated with md5(uniqid(rand())), however, in the case of misconfigured servers with Directory listing enabled, accessing it is trivial.

Affected products

• N5 Upload Form: through 1.0

References

• https://github.com/jinhuang1102/CVE-ID-Reports/blob/12863f80ced5361e2e2c3f7209566ab3730aa37b/N5_upload.md
• https://wpscan.com/vulnerability/d7a72183-0cd1-45de-b98b-2e295b27e5db
• https://github.com/jinhuang1102/CVE-ID-Reports/blob/12863f80ced5361e2e2c3f7209566ab3730aa37b/N5_upload.md
• https://wpscan.com/vulnerability/d7a72183-0cd1-45de-b98b-2e295b27e5db

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