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Joomla! CMS CVE-2026-48956

| EUVDEUVD-2026-42065 MEDIUM
Improper Access Control (CWE-284)
2026-07-07 Joomla GHSA-x853-rpgv-6qxj
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 frontend endpoint, low complexity; PR:L assumed as 'users' implies authenticated but low-privilege access; impact limited to module list disclosure only.

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 - 18:55 vuln.today

DescriptionCVE.org

An improper access check allows users to display a list of modules in the frontend.

AnalysisAI

Incorrect access control in Joomla! CMS's com_modules component exposes the module listing interface to frontend users who should not have visibility into installed modules. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Access Joomla frontend with user session
Delivery
Send request to com_modules frontend endpoint
Exploit
Access control check bypassed
Execution
Receive module inventory response
Persist
Enumerate installed extensions for known CVEs
Impact
Target vulnerable extension for follow-on attack
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Vulnerability AssessmentAI

Exploitation Exploitation requires network access to a Joomla! … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H) presents a notable internal tension: PR:H indicates exploitation requires high privileges, yet the subsequent-system impacts are all rated High (SC:H/SI:H/SA:H), implying a high-privilege actor can leverage disclosed module information to cause significant damage to downstream or chained systems. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated user (or an attacker who has obtained a low-privilege Joomla frontend account) sends a crafted HTTP GET request to the com_modules frontend endpoint. Due to the missing or insufficient ACL check, the server returns the full module listing - including module type names, positions, ordering, and potentially publishing state - that should only be accessible to backend administrators. …
Remediation Apply the patch released by 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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CVE-2026-48956 vulnerability details – vuln.today
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