CVE-2023-53952Public exploitNetwork attack vectorHinoki check available

Authenticated code execution via dangerous .phar upload

Published Dec 19, 2025 · Updated Dec 19, 2025

Unrestricted file upload in Dotclear 2.25.3 allows remote authenticated users to execute arbitrary PHP via a crafted .phar file. The blog post creation interface accepts a .phar upload into the public media path without blocking its executable file type. Access to a post-authoring account is required, and requesting the uploaded file causes the web server to run its PHP payload.

CVSS severity8.7
High
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Unrestricted file upload in Dotclear 2.25.3 allows remote authenticated users to execute arbitrary PHP via a crafted .phar file. The blog post creation interface accepts a .phar upload into the public media path without blocking its executable file type. Access to a post-authoring account is required, and requesting the uploaded file causes the web server to run its PHP payload.

The record

CVE
CVE-2023-53952
Published
Dec 19, 2025
Updated
Dec 19, 2025
Vendor
Dotclear
Product
Dotclear
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 19, 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=2.25.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Dotclear · Dotclearversion=2.25.3

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/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 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-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.

Technologies

Your stack

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Your stack

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