CVE-2026-66092 json
Stored XSS in pre-login notice via reachable legacy logon route
published 14d ago modified 13d ago also EUVD-2026-112568 , GHSA-9jhj-7h37-3j2c
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository openequella/openEQUELLA. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 4.8
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 26%
- public exploits
- 0
- none known
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 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
Patch / fix
- Apereo Foundation openEQUELLA 2026.2
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- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 14d ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 4.8 | 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 |
| CNA | 4.0 | 4.8 | 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/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:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Apereo Foundation openEQUELLA
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/openequella/openEQUELLA/security/advisories/GHSA-9jhj-7h37-3j2c
vendor-advisory, advisory
-
openequella.github.io
/guides/
product
Sources
- CVE List CVE-2026-66092
- NVD CVE-2026-66092
- Maintainer advisory GHSA-9jhj-7h37-3j2c
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of openequella/openEQUELLA published their own advisory on GitHub. Reviewed sources take precedence over it.