CVE-2026-73397Network attack vector

Unauthenticated code execution via unsafe deserialization

Published Aug 18, 2026 · Updated Aug 18, 2026

Deserialization of untrusted data in KaineLabs Youzify 1.3.7 and earlier allows remote attackers to execute code via crafted requests. Public records do not identify the vulnerable file, function, or input field, but the CVE and Patchstack advisory describe unauthenticated processing of attacker-controlled serialized data. Any internet-reachable WordPress site running the plugin is exposed, and successful exploitation can plausibly yield full site compromise through a suitable PHP object chain.

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

Deserialization of untrusted data in KaineLabs Youzify 1.3.7 and earlier allows remote attackers to execute code via crafted requests. Public records do not identify the vulnerable file, function, or input field, but the CVE and Patchstack advisory describe unauthenticated processing of attacker-controlled serialized data. Any internet-reachable WordPress site running the plugin is exposed, and successful exploitation can plausibly yield full site compromise through a suitable PHP object chain.

The record

CVE
CVE-2026-73397
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
KaineLabs
Product
Youzify
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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 <=1.3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

KaineLabs · Youzifyversion=n/a <=1.3.7

Published CVSS scores

9.8Rapid7CVSS: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 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 exploitUnconfirmed

Weakness, pattern, technique

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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