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Stored XSS in pre-login notice via reachable legacy logon route

Exact source revision recorded 29 Oct 2026 03:25:09 UTC. It does not establish the source's current position. Latest evidence.

cve-program · CVE-2026-66092

Published

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

Source published
29 Oct 2026 01:39:28 UTC
Source modified
29 Oct 2026 01:39:28 UTC
Observed here
29 Oct 2026 03:25:09 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 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

ChangeIntel

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Sources read 7 Nov 08:57 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current