CVE-2026-73993Network attack vector

PHP object injection via unsafe deserialization

Published Aug 20, 2026 · Updated Aug 20, 2026

PHP object injection in FundEngine for WordPress before 1.8.0 allows remote attackers to inject PHP objects via donation and report requests. Public sources identify the donation submission and reports functionality as the affected locus; retrieved technical detail states that untrusted input is deserialized there, but the vendor and CNA record do not disclose the specific sink or parameter. No authentication or user interaction is required, and impact beyond object injection depends on a usable POP chain in FundEngine itself or in another installed plugin or theme.

CVSS severity9.8
Critical
EPSS probability0.39%
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 FundEngine for WordPress before 1.8.0 allows remote attackers to inject PHP objects via donation and report requests. Public sources identify the donation submission and reports functionality as the affected locus; retrieved technical detail states that untrusted input is deserialized there, but the vendor and CNA record do not disclose the specific sink or parameter. No authentication or user interaction is required, and impact beyond object injection depends on a usable POP chain in FundEngine itself or in another installed plugin or theme.

The record

CVE
CVE-2026-73993
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Roxnor
Product
FundEngine
Classifications
CWE-502, CAPEC-586, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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=n/a <=1.7.9 changes=[{"at":"1.8.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Roxnor · FundEngineversion=n/a <=1.7.9 changes=[{"at":"1.8.0","status":"unaffected"}]

Published CVSS scores

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.

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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