Cross-site scripting via insufficient accessiblemedia input validation
Published Jul 9, 2024 · Updated Mar 26, 2025
Cross-site scripting in Joomla! CMS 4.0.0 through 4.4.5 and 5.0.0 through 5.1.1 allows remote attackers to run script via accessiblemedia input. The accessiblemedia field accepts insufficiently validated input that is later rendered as active page content, but Joomla has not disclosed the exact code path or missing validation operation. Exploitation requires a user to render the crafted content; successful script runs in that user's browser context and can read or alter data available to the page.
Summary
What happened
Cross-site scripting in Joomla! CMS 4.0.0 through 4.4.5 and 5.0.0 through 5.1.1 allows remote attackers to run script via accessiblemedia input. The accessiblemedia field accepts insufficiently validated input that is later rendered as active page content, but Joomla has not disclosed the exact code path or missing validation operation. Exploitation requires a user to render the crafted content; successful script runs in that user's browser context and can read or alter data available to the page.
The record
- CVE
- CVE-2024-21729
- Published
- Jul 9, 2024
- Updated
- Mar 26, 2025
- Vendor
- Joomla! Project
- Product
- Joomla! CMS
- Classifications
- CWE-79, T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 9, 2024CVE publishedPublication date reported by the CVE source.
- Mar 26, 2025Record 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.
- Affected versionversion=4.0.0-4.4.5
- Affected versionversion=5.0.0-5.1.1
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
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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