CVE-2026-66490 - Vulnerability Details - OpenCVE

Description

Joomla Extension - balbooa.com - Stored cross-site scripting via a comment avatar in Gridbox < 2.20.2

Published: 2026-07-29

Score: 6.1 Medium

EPSS: n/a

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

balbooa.com

Gridbox extension for Joomla

unaffected

Version	Status	Constraints
`1.0.0-2.20.1`	affected	—

No data.

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://mysites.guru/blog/gridbox-23-critical-vulnerabilities/
https://www.balbooa.com/gridbox

History

Wed, 29 Jul 2026 15:30:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 29 Jul 2026 14:00:00 +0000

Type	Values Removed	Values Added
Description		Joomla Extension - balbooa.com - Stored cross-site scripting via a comment avatar in Gridbox < 2.20.2
Title		Joomla Extension - balbooa.com - Stored cross-site scripting via a comment avatar in Gridbox < 2.20.2
Weaknesses		CWE-79
References		https://mysites.guru/blog/gridbox-23-critical-vulnerabilities/ https://www.balbooa.com/gridbox

Subscriptions

No data.

MITRE

Status: PUBLISHED

Assigner: Joomla

Published: 2026-07-29T13:54:24.941Z

Updated: 2026-07-29T15:09:31.680Z

Reserved: 2026-07-27T13:01:42.270Z

Link: CVE-2026-66490

Vulnrichment

Updated: 2026-07-29T14:42:49.701Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-79

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