EUVD-2026-61031
GHSA-98h8-835v-74fm
Severity by source
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
High privileges required to trigger schema.org generation; only low confidentiality impact (contact data); no integrity or availability loss; no scope change.
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
Lifecycle Timeline
2DescriptionCVE.org
Joomla! Core - [20260809] - Improper ACL checks when injection schema.org contact data in Joomla 5.1.0-5.4.7 and 6.0.0-6.1.2 - An improper access check injects contact information for unaccessible contact items into schema.org snippets.
AnalysisAI
Improper access control in Joomla! CMS 5.1.0-5.4.7 and 6.0.0-6.1.2 leaks restricted contact data into schema.org structured data snippets embedded in page output. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated Joomla session with high-privilege access (PR:H per CVSS 4.0 vector), meaning the attacker must already hold a high-level Joomla user role such as editor, publisher, or administrator. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 4.0 score of 5.1 (Medium) reflects the limited blast radius of this vulnerability: the impact is confined to low confidentiality disclosure (VC:L), with no integrity or availability consequences. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A high-privilege Joomla backend user - such as an editor or publisher - navigates to or triggers a page that generates schema.org contact snippets. The CMS fails to apply ACL rules during snippet assembly, causing contact records restricted to higher access levels to be embedded in the rendered page's structured data markup. … |
| Remediation | Consult the Joomla Security Centre advisory at https://developer.joomla.org/security-centre/1076-20260809-core-improper-acl-checks-when-injection-schema-org-contact-data.html for the patched release version; an exact fix version is not confirmed in the available intelligence data but Joomla's advisory naming convention (20260809) suggests a maintenance release follows the reported upper bounds (5.4.7 and 6.1.2). … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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