CVE-2023-53889Public exploitNetwork attack vector

Authenticated code execution via executable asset upload

Published Dec 15, 2025 · Updated Dec 15, 2025

Unrestricted file upload in Perch 3.2 allows remote authenticated users with administrator access to execute server commands. The Assets edit handler accepts a .phar file as the multipart image field and stores it under the web-accessible resources path without blocking executable PHP types. Administrator control-panel access is required; requesting the stored file runs its embedded PHP with the web server's privileges.

CVSS severity8.6
High
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Unrestricted file upload in Perch 3.2 allows remote authenticated users with administrator access to execute server commands. The Assets edit handler accepts a .phar file as the multipart image field and stores it under the web-accessible resources path without blocking executable PHP types. Administrator control-panel access is required; requesting the stored file runs its embedded PHP with the web server's privileges.

The record

CVE
CVE-2023-53889
Published
Dec 15, 2025
Updated
Dec 15, 2025
Vendor
Perch Runway Limited
Product
Perch
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Perch Runway Limited · Perchversion=3.2

Published CVSS scores

8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.2NVDCVSS:3.1/AV:N/AC:L/PR:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo