CVE-2026-16502Network attack vector

Authenticated object injection via shortcode deserialization

Published Sep 8, 2026 · Updated Sep 8, 2026

PHP object injection in Live Composer Page Builder 2.1.18 and earlier allows remote authenticated users to inject objects via a shortcode. Module shortcode output handlers deserialize attacker-controlled shortcode data without prohibiting PHP object instantiation. Contributor-level access is required, and file deletion, data disclosure, or code execution additionally requires a compatible POP chain from another installed plugin or theme.

CVSS severity8.8
High
EPSS probability0.47%
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 Live Composer Page Builder 2.1.18 and earlier allows remote authenticated users to inject objects via a shortcode. Module shortcode output handlers deserialize attacker-controlled shortcode data without prohibiting PHP object instantiation. Contributor-level access is required, and file deletion, data disclosure, or code execution additionally requires a compatible POP chain from another installed plugin or theme.

The record

CVE
CVE-2026-16502
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Live Composer
Product
Live Composer Page Builder
Classifications
CWE-502, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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 <=2.1.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Live Composer · Live Composer Page Builderversion=0 <=2.1.18

Published CVSS scores

8.8WordfenceCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1068Exploitation for Privilege Escalation

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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