EUVD-2026-63237
GHSA-5qx9-5vj6-wf25
Severity by source
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
Network-accessible endpoint requires no authentication (PR:N); scope is unchanged as impact is confined to Zoo content tags; only low integrity impact applies with no confidentiality or availability effect.
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
Lifecycle Timeline
1DescriptionCVE.org
Joomla Extension - yootheme.com - Unauthenticated tag modifications in Zoo < 4.1.65 - The comment controller endpoint lacked ACL checks, allowing unauthorized tag modifications by unauthenticated users.
AnalysisAI
Unauthorized tag modification in YOOtheme Zoo for Joomla (all versions below 4.1.65) is fully exploitable by unauthenticated network attackers due to a missing ACL enforcement on the comment controller endpoint. Any remote party can send crafted requests to arbitrarily modify content tags without presenting credentials. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target Joomla site must have the YOOtheme Zoo extension installed and running a version below 4.1.65. … 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) confirms full network accessibility with no authentication or special conditions required, yielding a base score of 6.9. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker identifies a publicly accessible Joomla site running YOOtheme Zoo below 4.1.65 by observing Joomla component signatures in the page source or via passive reconnaissance. The attacker sends a crafted HTTP POST request directly to the Zoo comment controller endpoint - requiring no session token or credentials - and manipulates content item tags. … |
| Remediation | Upgrade the YOOtheme Zoo extension to version 4.1.65 or later, which introduces proper ACL enforcement on the comment controller endpoint. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
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