CVE-2026-16788Network attack vector

Browser script execution via unescaped project shortcode

Published Sep 1, 2026 · Updated Sep 1, 2026

Stored XSS in Live Composer Page Builder 2.1.19 and earlier allows remote authenticated users to execute scripts through a project shortcode. The dslc_module_projects_output renderer emits fields including view_all_link and button_text without output escaping after shortcode-aware KSES filtering preserves the serialized body. Contributor-level access is required to store a payload, which runs in the browser of anyone who opens the affected page.

CVSS severity6.4
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Live Composer Page Builder 2.1.19 and earlier allows remote authenticated users to execute scripts through a project shortcode. The dslc_module_projects_output renderer emits fields including view_all_link and button_text without output escaping after shortcode-aware KSES filtering preserves the serialized body. Contributor-level access is required to store a payload, which runs in the browser of anyone who opens the affected page.

The record

CVE
CVE-2026-16788
Published
Sep 1, 2026
Updated
Sep 1, 2026
Vendor
Live Composer
Product
Live Composer Page Builder
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 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 <=2.1.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Live Composer · Live Composer Page Builderversion=0 <=2.1.19

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

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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