CVE-2023-53922Public exploitNetwork attack vector

Unauthenticated code execution via unrestricted .phar upload

Published Dec 17, 2025 · Updated Dec 17, 2025

Unrestricted file upload in TinyWebGallery 2.5 allows remote attackers to execute arbitrary server-side code through the admin uploader. The admin/index.php upload action accepts a userfile[] named with a .phar extension, stores it under pictures, and leaves it web-accessible for PHP execution. No authentication or user interaction is required; requesting the uploaded file executes its embedded PHP with the web server process privileges.

CVSS severity9.3
Critical
EPSS probability1.11%
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 TinyWebGallery 2.5 allows remote attackers to execute arbitrary server-side code through the admin uploader. The admin/index.php upload action accepts a userfile[] named with a .phar extension, stores it under pictures, and leaves it web-accessible for PHP execution. No authentication or user interaction is required; requesting the uploaded file executes its embedded PHP with the web server process privileges.

The record

CVE
CVE-2023-53922
Published
Dec 17, 2025
Updated
Dec 17, 2025
Vendor
TinyWebGallery
Product
TinyWebGallery
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 17, 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=2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TinyWebGallery · TinyWebGalleryversion=2.5

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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
Privilegesunauthenticated
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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