CVE-2022-23626Public exploitNetwork attack vector

Authenticated code execution via retained upload payload

Published Feb 8, 2022 · Updated Apr 22, 2025

Unrestricted file upload in m1k1o Blog before 1.4 allows remote authenticated users to execute code through a crafted image. The thumb method in app/image.class.php ignores false returns from imagecreatefrom* and image* operations, leaving the original uploaded payload on disk. A valid blog login and an uploaded file accepted as an image are required; the retained PHP payload can then execute under the web server account.

CVSS severity8.8
High
EPSS probability9.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in m1k1o Blog before 1.4 allows remote authenticated users to execute code through a crafted image. The thumb method in app/image.class.php ignores false returns from imagecreatefrom* and image* operations, leaving the original uploaded payload on disk. A valid blog login and an uploaded file accepted as an image are required; the retained PHP payload can then execute under the web server account.

The record

CVE
CVE-2022-23626
Published
Feb 8, 2022
Updated
Apr 22, 2025
Vendor
m1k1o
Product
Blog
Classifications
CWE-252, CWE-20, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=< 1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

m1k1o · Blogversion=< 1.4

Published CVSS scores

8.5GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-252Unchecked Return Value
CWE-20Improper Input Validation
T1505.003Server Software Component: Web Shell

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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