---
id: CVE-2026-66092
title: Stored XSS in pre-login notice via reachable legacy logon route
summary: >-
  In openEQUELLA before 2026.2, the pre-login notice is stored as HTML and
  rendered on the legacy logon page without encoding or sanitisation. A user
  holding the EDIT_SYSTEM_SETTINGS permission can set a notice containing an
  arbitrary scri…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: Apereo Foundation
product: openEQUELLA
affected:
  - openEQUELLA >= 2019.1 < 2026.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-29T01:50:05.964473Z'
published: '2026-10-29'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T02:02:12.981Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-66092'
references:
  - url: >-
      https://github.com/openequella/openEQUELLA/security/advisories/GHSA-9jhj-7h37-3j2c
  - url: 'https://openequella.github.io/guides/'
tags:
  - cve.org
epss: 0.00326
epssPercentile: 0.25726
ingestedAt: '2026-10-31T01:14:13.028Z'
---

## Overview

In openEQUELLA before 2026.2, the pre-login notice is stored as HTML and rendered on the legacy logon page without encoding or sanitisation. A user holding the EDIT_SYSTEM_SETTINGS permission can set a notice containing an arbitrary script (PUT /api/preloginnotice), resulting in stored cross-site scripting on the login page. Unauthenticated exploitation is possible where EDIT_SYSTEM_SETTINGS has been granted to the guest user or Everyone

## Affected

- `openEQUELLA >= 2019.1 < 2026.2`

## Remediation

Update to vendor recommended versions