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Joomla! CMS EUVDEUVD-2026-61028

| CVE-2026-73371 MEDIUM
Improper Access Control (CWE-284)
2026-08-18 Joomla GHSA-pgq5-9qw5-hh78
Authentication Bypass Joomla Cms
5.1
CVSS 4.0 · Vendor: Joomla
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Severity by source

Vendor (Joomla) PRIMARY
5.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/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
vuln.today AI
2.7 LOW

PR:H reflects required backend authentication; C:L captures unauthorized content read via copy; no integrity or availability impact per vendor assessment.

3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:H/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: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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Aug 18, 2026 - 16:54 vuln.today
CVE Published
Aug 18, 2026 - 16:04 cve.org
MEDIUM 5.1

DescriptionCVE.org

Joomla! Core - [20260808] - Improper ACL checks for batch copy actions in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper access check allows unauthorized users to perform copy batch operations on uneditable items.

AnalysisAI

Improper ACL enforcement in Joomla! CMS batch copy functionality allows authenticated backend users to copy content items they do not have edit permissions for, effectively bypassing content-level access controls. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires an active, authenticated session in the Joomla administrator backend - corresponding to CVSS PR:H (high privileges). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 5.1 reflects moderate severity, and the vector metrics align with a realistic threat model: AV:N (network-reachable via standard HTTP), AC:L (no special conditions), but critically PR:H (high privileges required), which substantially constrains the attack surface. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to the patched release identified in the Joomla Security Centre advisory at https://developer.joomla.org/security-centre/20260808-core-improper-acl-checks-for-batch-copy-actions.html - the exact fixed version is not independently confirmed from the available input data, so administrators should consult this advisory directly to identify the minimum safe version for their branch (expected to be 5.4.8+ for 5.x and 6.1.3+ for 6.x). … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-61028 vulnerability details – vuln.today
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