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Fabrik for Joomla EUVDEUVD-2026-64318

| CVE-2026-76609 MEDIUM
Improper Access Control (CWE-284)
2026-08-22 Joomla GHSA-95fc-c7hw-jf5x
Authentication Bypass Fabrik Extension For Joomla
6.9
CVSS 4.0 · Vendor: Joomla
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Severity by source

Vendor (Joomla) PRIMARY
6.9 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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
5.3 MEDIUM

Network-accessible unauthenticated endpoint with no complexity; impact limited to low-integrity comment modification only, no confidentiality or availability change.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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:N/UI:N/VC:N/VI:L/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
None
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Aug 22, 2026 - 15:17 vuln.today

DescriptionCVE.org

Joomla Extension - fabrikar.com - Unauthenticated modification of any comment in Fabrik < 4.7.2 - The onUpdateComment endpoint did not perform any access checks.

AnalysisAI

Unauthenticated comment tampering in the Fabrik extension for Joomla exposes all versions from 1.0.0 through 4.7.1 to arbitrary comment modification by any remote actor. The onUpdateComment endpoint performs no access control checks whatsoever - no session validation, no ownership verification - allowing any unauthenticated HTTP request to overwrite comment content in the database. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation No special conditions are required beyond the Fabrik extension for Joomla (versions 1.0.0-4.7.1) being installed, enabled, and reachable over the network - this applies to default Fabrik configurations with comment functionality active. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) signals the most permissive exploitation conditions possible: fully unauthenticated, network-reachable, no complexity, no preconditions. … 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 the Fabrik extension for Joomla to version 4.7.2 or later, which adds the missing access control checks to the onUpdateComment endpoint; this is the only confirmed fix per the CVE description and EUVD-2026-64318. … 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-2026-64318 vulnerability details – vuln.today
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