---
id: CVE-2026-63156
title: >-
  Omnispace Agora Project before 26.10.0 contains a reflected cross-site
  scripting vulnerability that allows unauthenticated attackers to inject
  malicious HTML attributes by manipulating the visioUrl parameter, which was
  not routed through…
summary: >-
  Omnispace Agora Project before 26.10.0 contains a reflected cross-site
  scripting vulnerability that allows unauthenticated attackers to inject
  malicious HTML attributes by manipulating the visioUrl parameter, which was
  not routed through…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: Omnispace
product: Agora Project
affected:
  - agora_project < 26.10.0
published: '2026-10-13'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T15:52:40.503'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63156'
references:
  - url: 'https://github.com/xech/agora-project/releases/tag/26.10'
    label: disclosure@vulncheck.com
  - url: 'https://www.agora-project.net/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/omnispace-agora-project-reflected-xss-via-visiourl-parameter
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00303
epssPercentile: 0.22861
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-14T14:53:23.496838Z'
ingestedAt: '2026-10-13T21:58:14.182Z'
---

## Overview

Omnispace Agora Project before 26.10.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious HTML attributes by manipulating the visioUrl parameter, which was not routed through the URL-sanitizing branch of the parameter filter and was urldecoded after filtering. Attackers can craft a malicious URL containing the visioUrl parameter with an attribute breakout payload to execute arbitrary JavaScript in the victim's browser pre-authentication, with the issue fixed in version 26.10.0 via changes to app/Common/Req.php.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.