CVE-2020-36849Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via unrestricted PHP upload

Published Jul 12, 2025 · Updated Apr 8, 2026

Unrestricted file upload in AIT Themes AIT CSV Import/Export 3.0.3 and earlier allows remote attackers to execute PHP code. The public upload-handler.php endpoint accepts multipart file content without authentication or type validation and leaves it executable in wp-content/uploads/. The plugin need only be installed, not activated; successful exploitation grants the web server's PHP execution privileges.

CVSS severity9.8
Critical
EPSS probability6.98%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in AIT Themes AIT CSV Import/Export 3.0.3 and earlier allows remote attackers to execute PHP code. The public upload-handler.php endpoint accepts multipart file content without authentication or type validation and leaves it executable in wp-content/uploads/. The plugin need only be installed, not activated; successful exploitation grants the web server's PHP execution privileges.

The record

CVE
CVE-2020-36849
Published
Jul 12, 2025
Updated
Apr 8, 2026
Vendor
AIT Themes
Product
AIT CSV Import/Export
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 12, 2020Exploitation reportedWPScan honeypot exploitation attempt
  2. Jul 12, 2025CVE publishedPublication date reported by the CVE source.
  3. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AIT Themes · AIT CSV Import/Exportversion=0 <=3.0.3

Published CVSS scores

9.8WordfenceCVSS: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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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