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Joomla! CMS EUVDEUVD-2026-42066

| CVE-2026-48955 MEDIUM
Improper Access Control (CWE-284)
2026-07-07 Joomla GHSA-9hj5-278h-wg3j
Authentication Bypass Joomla Cms
6.4
CVSS 4.0 · Vendor: Joomla
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Severity by source

Vendor (Joomla) PRIMARY
6.4 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H/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
vuln.today AI
4.3 MEDIUM

Network-accessible authorization bypass requiring authenticated but low-privilege access; impact confined to read-only workflow metadata disclosure with no integrity or availability consequence.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Joomla).

CVSS VectorVendor: Joomla

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Jul 07, 2026 - 18:57 vuln.today

DescriptionCVE.org

An improper access check allows unauthorized users to access workflow stage and transition information.

AnalysisAI

Unauthorized access to workflow stage and transition data in Joomla! CMS is possible due to an improper access check in the com_workflow component (CWE-284), allowing authenticated users who lack the necessary workflow management permissions to read internal content publication configuration. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate with any valid Joomla account
Delivery
Send crafted request to com_workflow endpoint
Exploit
Bypass per-role access control check
Execution
Read restricted workflow stage and transition metadata
Impact
Map content approval chain for follow-on targeting
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Vulnerability AssessmentAI

Exploitation The attacker must hold a valid authenticated Joomla! … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 6.4 places this in the medium band. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with a valid but low-privilege Joomla account - such as a Registered or Author role - sends a crafted HTTP request directly to the com_workflow component endpoint, bypassing the access control gate due to the improper authorization check. The server returns workflow stage names, ordering, and configured transition rules that the user's role should not be permitted to view. …
Remediation Consult the Joomla! … Detailed patch versions, workarounds, and compensating controls in full report.
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Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-42066 vulnerability details – vuln.today
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