Review reviewHigh
CVE-2026-40383
Joomla! Project Joomla! CMS, joomla!
An improper validation of user-supplied input leads to a local file inclusion vulnerability.
- CVSS
- 7.5
- EPSS
- 0.50% 40.1% percentile
- CISA KEV
- Not listed
- Published
- 2026.05.27
Review review
The CVSS severity warrants an early asset and exposure review.
Known exploitationNot established by KEV
Exploit probability0.50%
Technical severityCVSS 7.5
Vulnerability overview
An improper validation of user-supplied input leads to a local file inclusion vulnerability.
Affected product and versions
- Product
- Joomla! Project Joomla! CMS, joomla!
- Affected versions
- >= 3.2.1-5.4.5, >= 6.0.0-6.1.0, >= 3.2.1 < 5.4.6, >= 6.0.0 < 6.1.1
- Fixed versions
- 5.4.6, 6.1.1
Recommended response sequence
Confirm exposure before applying a vendor-supported change.
- 1Identify
Confirm that Joomla! Project Joomla! CMS, joomla! and an affected version are present.
- 2Prioritize
Combine exploitation signals with asset exposure and business criticality.
- 3Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
- 4Verify
Recheck the version, service health, access paths, and relevant logs.
Technical data
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CWE
- CWE-22