CVE-2025-24671Network attack vector

Unauthenticated object injection via serialized custom data

Published Jan 27, 2025 · Updated May 11, 2026

PHP object injection in PDFCrowd Save as PDF Plugin 4.4.0 and earlier allows remote attackers to inject PHP objects through custom data. The custom-data processor accepts PHP-native serialized values and deserializes them without ensuring that the resulting objects are safe. A suitable POP chain in another installed plugin or theme is required for file deletion, data retrieval, or code execution.

CVSS severity9.8
Critical
EPSS probability0.53%
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 PDFCrowd Save as PDF Plugin 4.4.0 and earlier allows remote attackers to inject PHP objects through custom data. The custom-data processor accepts PHP-native serialized values and deserializes them without ensuring that the resulting objects are safe. A suitable POP chain in another installed plugin or theme is required for file deletion, data retrieval, or code execution.

The record

CVE
CVE-2025-24671
Published
Jan 27, 2025
Updated
May 11, 2026
Vendor
Charlestsmith
Product
Save as PDF Plugin by PDFCrowd
Classifications
CWE-502, CAPEC-586, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record 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 <=4.4.0 changes=[{"at":"4.4.1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Charlestsmith · Save as PDF Plugin by PDFCrowdversion=0 <=4.4.0 changes=[{"at":"4.4.1","status":"unaffected"}]

Published CVSS scores

8.1WordfenceCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8PatchstackCVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CAPEC-586Object Injection
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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