EUVD-2026-77309
GHSA-xc7p-wr44-hv2x
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/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:N/AU:N/R:X/V:X/RE:X/U:X
Author-level account required (PR:L); stored XSS triggers on victim page view (UI:R); script executes in victim browser crossing scope (S:C); no availability impact.
Primary rating from Vendor (Joomla).
CVSS VectorVendor: Joomla
Lifecycle Timeline
3DescriptionCVE.org
Joomla Extension - regularlabs.com - Privileged stored XSS via event handler option in Modals Pro extension for Joomla < 17.0.0 - Modals Pro intentionally supports JavaScript Events such as on-open and on-closed. Affected versions do not distinguish trusted extension configuration from event code supplied in ordinary article content. A lower-privileged author can therefore use a documented executable feature which should be reserved for trusted authors.
AnalysisAI
Stored cross-site scripting in the Modals Pro extension for Joomla (regularlabs.com) versions prior to 17.0.0 allows an authenticated Author-level user to inject executable JavaScript via documented event handler options (on-open, on-closed) embedded in article content. The extension intentionally supports JavaScript lifecycle events for modal dialogs but fails to enforce access control distinguishing which roles may supply executable code versus static configuration parameters - enabling a lower-privileged author to weaponize a trusted-user feature. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated Joomla user account with at least the Author role (content creation rights). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-supplied CVSS 4.0 vector (AV:N/AC:L/AT:P/PR:H/UI:N) scores 7.5. … 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 Modals Pro extension to version 17.0.0 or later, which enforces access control to restrict JavaScript event handler injection to appropriately trusted user roles. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Joomla systems to identify Modals Pro deployment and determine current version via the administrator Extensions Manager. …
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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