CVE-2026-87741Network attack vector

PHP object injection via injected modal shortcode

Published Sep 28, 2026 · Updated Sep 28, 2026

PHP object injection in ConvertPlus 3.6.3 and earlier allows remote authenticated users to inject objects through the preview AJAX action. The cp_display_preview_modal callback accepts an omitted nonce and passes the sanitized style value into do_shortcode(), where injected smile_modal markup reaches unrestricted maybe_unserialize(). Subscriber access is sufficient, but file deletion, data exposure, or code execution requires a POP chain in another installed plugin or theme.

CVSS severity8.8
High
EPSS probability0.40%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in ConvertPlus 3.6.3 and earlier allows remote authenticated users to inject objects through the preview AJAX action. The cp_display_preview_modal callback accepts an omitted nonce and passes the sanitized style value into do_shortcode(), where injected smile_modal markup reaches unrestricted maybe_unserialize(). Subscriber access is sufficient, but file deletion, data exposure, or code execution requires a POP chain in another installed plugin or theme.

The record

CVE
CVE-2026-87741
Published
Sep 28, 2026
Updated
Sep 28, 2026
Vendor
Presto Made, Inc.
Product
ConvertPlus
Classifications
CWE-78, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 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 <=3.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Presto Made, Inc. · ConvertPlusversion=0 <=3.6.3

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command 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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