CVE-2023-4643Public exploitNetwork attack vector

Authenticated object injection via post-content deserialization

Published Oct 16, 2023 · Updated Apr 23, 2025

PHP object injection in ShortPixel Enable Media Replace before 4.1.3 allows remote authenticated users to invoke gadget methods via post content. The Remove Background workflow passes attacker-controlled post content to PHP unserialize(), constructing objects without restricting allowed classes. Author-level access and a suitable gadget chain from another installed component are required; exploitation can delete files, disclose data, or execute code.

CVSS severity8.8
High
EPSS probability0.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in ShortPixel Enable Media Replace before 4.1.3 allows remote authenticated users to invoke gadget methods via post content. The Remove Background workflow passes attacker-controlled post content to PHP unserialize(), constructing objects without restricting allowed classes. Author-level access and a suitable gadget chain from another installed component are required; exploitation can delete files, disclose data, or execute code.

The record

CVE
CVE-2023-4643
Published
Oct 16, 2023
Updated
Apr 23, 2025
Vendor
ShortPixel
Product
Enable Media Replace
Classifications
CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=0 <4.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ShortPixel · Enable Media Replaceversion=0 <4.1.3

Published CVSS scores

8.8NVDCVSS: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-502Deserialization of Untrusted Data
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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