CVE-2020-5505Public exploitNetwork attack vector

Remote code execution via PHP data URI

Published Jan 14, 2020 · Updated Aug 4, 2024

Code injection in Freelancy 1.0.0 allows remote attackers to execute arbitrary PHP code through a crafted /api/files/ request. The endpoint accepts a file value beginning with data:application/x-php;base64 alongside an application/x-php type, then processes the decoded payload as executable PHP instead of rejecting active content. Network access is sufficient and no authentication or user interaction is required, allowing commands to run with the web application's privileges.

CVSS severity9.8
Critical
EPSS probability44.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Freelancy 1.0.0 allows remote attackers to execute arbitrary PHP code through a crafted /api/files/ request. The endpoint accepts a file value beginning with data:application/x-php;base64 alongside an application/x-php type, then processes the decoded payload as executable PHP instead of rejecting active content. Network access is sufficient and no authentication or user interaction is required, allowing commands to run with the web application's privileges.

The record

CVE
CVE-2020-5505
Published
Jan 14, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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