EUVD-2026-42067
GHSA-f8m6-4q3w-326j
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/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
PR:H reflects mandatory admin-level access to com_templates; S:C and UI:R capture XSS executing in a victim admin's browser context; no availability impact applies.
Primary rating from Vendor (Joomla).
CVSS VectorVendor: Joomla
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/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
Lack of escaping leads to an XSS vulnerability in the file management view of com_templates.
AnalysisAI
Cross-site scripting in Joomla! CMS com_templates file management view allows a high-privileged attacker to inject unescaped malicious script that executes in the browser of any administrator who subsequently views the affected template file listing. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a Joomla administrator account with access to the Templates manager (com_templates), which is a non-default privilege granted only to users in the Administrator or Super User groups. … 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:H/UI:P/VC:H/VI:H/VA:L) reveals a nuanced risk profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with Joomla administrator credentials navigates to the Templates file management view and crafts or uploads a resource (such as a file or directory) whose name contains an unsanitized XSS payload. When a second administrator - or the same attacker targeting their own session for demonstration - loads the file management view, the unescaped payload executes in the browser, allowing the attacker to steal the active session token and assume full administrative control of the Joomla site. … |
| Remediation | The primary remediation is to upgrade Joomla! … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
Leaving vuln.today