Nginx UI: Casdoor SSO callback uses a constant state parameter (login CSRF)

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

EPSS

• CVE-2026-84312: 0.17% estimated exploitation activity in the next 30 days; percentile 6.67 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary In the Casdoor SSO flow, the OAuth `state` parameter is hard-coded to `settings.CasdoorSettings.Application` — a value identical for every user and every login. The callback handler accepts whatever `state` the client sends without comparing it to anything stored in the user agent, enabling a login-CSRF: an attacker can force the victim's browser to authenticate as the *attacker*.

Details `api/user/casdoor.go:92-117` (`GetCasdoorUri`): ```go func GetCasdoorUri(c *gin.Context) { clientId := settings.CasdoorSettings.ClientId redirectUri := settings.CasdoorSettings.RedirectUri state := settings.CasdoorSettings.Application // ← constant ... c.JSON(http.StatusOK, gin.H{ "uri": fmt.Sprintf( "%s/login/oauth/authorize?client_id=%s&response_type=code&redirect_uri=%s&state=%s&scope=read", endpoint, clientId, encodedRedirectUri, state), }) } ``` `api/user/casdoor.go:24-90` (`CasdoorCallback`): ```go type CasdoorLoginUser struct { Code string `json:"code"…

Published by the source

19 Oct 2026, 21:08 UTC

Last modified by the source

28 Oct 2026, 15:15 UTC

Source last checked

29 Oct 2026, 06:45 UTC

1. Revision 3 · amended · 29 Oct 2026

   Amended from osv record GHSA-44xr-mrhh-qm78

2. Revision 2 · amended · 28 Oct 2026

   Amended from ghsa record GHSA-44xr-mrhh-qm78

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GO-2026-6773

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# Patch Next advisory brief: CVE-2026-84312

Advisory: Nginx UI: Casdoor SSO callback uses a constant `state` parameter (login CSRF)
IDs: CVE-2026-84312, GHSA-44xr-mrhh-qm78
Record: https://patchnext.com/advisories/cve-2026-84312 (revision 3, source checked 29 Oct 2026, 06:45 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/0xJacky/Nginx-UI 1.9.10-0.20260703131214-23d1934099b0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/0xJacky/Nginx-UI: affected < 1.9.10-0.20260703131214-23d1934099b0; fixed in 1.9.10-0.20260703131214-23d1934099b0

## Suggested inspection (read-only)
- Go github.com/0xJacky/Nginx-UI: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/0xJacky/Nginx-UI.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GO-2026-6773 (OSV record GO-2026-6773 lists affected ranges: Go github.com/0xJacky/Nginx-UI >=0)
- Verified: https://github.com/advisories/GHSA-44xr-mrhh-qm78 (GitHub-reviewed advisory GHSA-44xr-mrhh-qm78 lists affected ranges: Go github.com/0xJacky/Nginx-UI >=0 <1.9.10-0.20260703131214-23d1934099b0)
- Verified: https://osv.dev/vulnerability/GHSA-44xr-mrhh-qm78 (OSV record GHSA-44xr-mrhh-qm78 lists affected ranges: Go github.com/0xJacky/Nginx-UI >=0 <1.9.10-0.20260703131214-23d1934099b0 (fixed))

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