CVE-2021-24273Network attack vector

Stored XSS via unfiltered widget tag parameters

Published May 5, 2021 · Updated Aug 3, 2024

Stored XSS in Clever Addons for Elementor before 2.1.0 allows remote authenticated users to execute JavaScript in page viewers. Banner and Multi Banner accept title_tag values from save_builder requests and render them as HTML tag names without filtering or escaping; Animated Headlines similarly handles heading_tag. Contributor access is sufficient to store a payload, and the script runs when another user views or previews the saved page.

CVSS severity5.4
Medium
EPSS probability0.59%
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 Clever Addons for Elementor before 2.1.0 allows remote authenticated users to execute JavaScript in page viewers. Banner and Multi Banner accept title_tag values from save_builder requests and render them as HTML tag names without filtering or escaping; Animated Headlines similarly handles heading_tag. Contributor access is sufficient to store a payload, and the script runs when another user views or previews the saved page.

The record

CVE
CVE-2021-24273
Published
May 5, 2021
Updated
Aug 3, 2024
Vendor
ZooTemplate
Product
Clever Addons for Elementor
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 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=2.1.0 <2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ZooTemplate · Clever Addons for Elementorversion=2.1.0 <2.1.0

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
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-79Cross-site Scripting (XSS)
T1059.007Command and Scripting Interpreter: JavaScript

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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