CVE-2023-23752 Joomla! Improper Access Control Vulnerability
Joomla! contains an improper access control vulnerability that allows unauthorized access to webservice endpoints.
From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.
Should You Worry?
- CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 8 Jan 2024.
- Rated Medium severity (CVSS 5.3, scored by CISA).
- It has been in the catalogue for 1,033 days. Systems still unpatched now have almost certainly been scanned for it.
What It Is
An issue was discovered in Joomla! 4.0.0 through 4.2.7. An improper access check allows unauthorized access to webservice endpoints.
Affected Versions
| Product | Versions |
|---|---|
| Joomla! Project Joomla! CMS | 4.0.0-4.2.7 |
From the public CVE record, as supplied by the vendor. Always confirm against the vendor advisory.
What To Do Now
- 1
Find it
Search your asset inventory and external attack surface for Joomla!. Include cloud images, appliances and anything a supplier runs for you.
Attack Surface Management - 2
Fix it
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vulnerability Management - 3
Hunt for compromise
If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.
Incident Response - 4
Prove it is fixed
Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.
Penetration Testing
The Compliance Clock
General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.
More Exploited Joomla! Flaws
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