CVE-2020-36722Public exploitNetwork attack vector

Contributor-level stored XSS via unrestricted script insertion

Published Jun 7, 2023 · Updated Apr 8, 2026

Stored XSS in Visual Composer Website Builder 26.0 and earlier allows remote authenticated users to execute scripts via crafted editor input. The CSS/HTML/JavaScript settings page inherits edit_posts when no capability is supplied, and the editor decodes compressed, base64-encoded JSON without neutralizing embedded script before rendering it. Contributor-level access is sufficient, and stored payloads execute across front-end and administrative pages viewed by other users.

CVSS severity5.5
Medium
EPSS probability0.73%
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 Visual Composer Website Builder 26.0 and earlier allows remote authenticated users to execute scripts via crafted editor input. The CSS/HTML/JavaScript settings page inherits edit_posts when no capability is supplied, and the editor decodes compressed, base64-encoded JSON without neutralizing embedded script before rendering it. Contributor-level access is sufficient, and stored payloads execute across front-end and administrative pages viewed by other users.

The record

CVE
CVE-2020-36722
Published
Jun 7, 2023
Updated
Apr 8, 2026
Vendor
Visual Composer
Product
Visual Composer Website Builder
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 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 <=26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Visual Composer · Visual Composer Website Builderversion=0 <=26.0

Published CVSS scores

5.5WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

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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