CVE-2021-24203Known exploitationPublic exploitNetwork attack vector

Stored XSS via unchecked Divider HTML tag

Published Apr 5, 2021 · Updated Aug 3, 2024

Stored XSS in Elementor Website Builder before 3.1.4 allows remote authenticated users to execute JavaScript through the Divider widget. The server-side renderer accepts save_builder's html_tag value without enforcing its client-side allowlist, saving script and attacker-controlled text as executable markup. Contributor access is required, and the code runs when another user views or previews the saved page, exposing that viewer's WordPress session to administrator creation or backdoor installation.

CVSS severity5.4
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Elementor Website Builder before 3.1.4 allows remote authenticated users to execute JavaScript through the Divider widget. The server-side renderer accepts save_builder's html_tag value without enforcing its client-side allowlist, saving script and attacker-controlled text as executable markup. Contributor access is required, and the code runs when another user views or previews the saved page, exposing that viewer's WordPress session to administrator creation or backdoor installation.

The record

CVE
CVE-2021-24203
Published
Apr 5, 2021
Updated
Aug 3, 2024
Vendor
Elementor
Product
Elementor Website Builder
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=3.1.4 <3.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Elementor · Elementor Website Builderversion=3.1.4 <3.1.4

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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