What’s Vulnerable › Vulnerabilities

CVE-2021-24253: Classyfrieds <= 3.8 - Authenticated Arbitrary File Upload to RCE

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-06 · updated 2026-06-17
• Weakness: CWE-434

Description

The Classyfrieds WordPress plugin through 3.8 does not properly check the uploaded file when an authenticated user adds a listing, only checking the content-type in the request. This allows any authenticated user to upload arbitrary PHP files via the Add Listing feature of the plugin, leading to RCE.

Affected products

• Classyfrieds: through 3.8

References

• https://github.com/jinhuang1102/CVE-ID-Reports/blob/master/classyfrieds.md
• https://wpscan.com/vulnerability/ee42c233-0ff6-4b27-a5ec-ad3246bef079
• https://github.com/jinhuang1102/CVE-ID-Reports/blob/master/classyfrieds.md
• https://wpscan.com/vulnerability/ee42c233-0ff6-4b27-a5ec-ad3246bef079

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