CVE-2024-21725Network attack vector

Cross-site scripting via unescaped mail address outputs

Published Feb 20, 2024 · Updated Oct 28, 2024

Cross-site scripting in Joomla! CMS 4.0.0 through 4.4.2 and 5.0.0 through 5.0.2 allows remote attackers to execute script in a user browser. Mail-address outputs in various components undergo inadequate escaping before entering generated HTML, leaving address content executable as markup. Exploitation requires a user to view an affected output; execution remains in that browser context, with no reported service interruption.

CVSS severity6.1
Medium
EPSS probability32.21%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Joomla! CMS 4.0.0 through 4.4.2 and 5.0.0 through 5.0.2 allows remote attackers to execute script in a user browser. Mail-address outputs in various components undergo inadequate escaping before entering generated HTML, leaving address content executable as markup. Exploitation requires a user to view an affected output; execution remains in that browser context, with no reported service interruption.

The record

CVE
CVE-2024-21725
Published
Feb 20, 2024
Updated
Oct 28, 2024
Vendor
Joomla! Project
Product
Joomla! CMS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 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=4.0.0-4.4.2
  2. Affected versionversion=5.0.0-5.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Joomla! Project · Joomla! CMSversion=4.0.0-4.4.2; version=5.0.0-5.0.2

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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