CVE-2022-4606Public exploitNetwork attack vector

Authenticated code execution via unrestricted PHP upload

Published Dec 18, 2022 · Updated Apr 14, 2025

Arbitrary file upload in FlatPress before 1.3 allows remote authenticated users to execute code by uploading a PHP file. The uploader's onupload function validates the temporary upload path rather than the submitted filename before moving the file into a web-accessible media directory. Authenticated access to the uploader is required; opening the stored PHP file lets the web server execute attacker-supplied commands.

CVSS severity8.8
High
EPSS probability35.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in FlatPress before 1.3 allows remote authenticated users to execute code by uploading a PHP file. The uploader's onupload function validates the temporary upload path rather than the submitted filename before moving the file into a web-accessible media directory. Authenticated access to the uploader is required; opening the stored PHP file lets the web server execute attacker-supplied commands.

The record

CVE
CVE-2022-4606
Published
Dec 18, 2022
Updated
Apr 14, 2025
Vendor
FlatPress
Product
FlatPress
Classifications
CWE-98, T1505.003, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 2025Record 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=unspecified <1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FlatPress · FlatPressversion=unspecified <1.3

Published CVSS scores

8.8huntr.devCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-98Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
T1505.003Web Shell
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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