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CVE-2023-54398

CVE-2023-54398

validatedZero produced an exploit or a check.

GHSA-r89p-qrrf-vpmc ↗EUVD-2023-60691 ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).+0mkevAttacks confirmed in the real world.0d
Yonyou U8 Cloud 1.0; 2.0; 2.1; 2.3; 2.5; 2.6; 2.65; 2.7; 3.0; 3.1; 3.2; 3.5; 3.6; 3.6sp
CWE-502 Deserialization of Untrusted Data
ETK-2026-507, permanent identifier
cvss9.8nvdCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
+18dTTV
26mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
trigger signal +0dcve.org publication+0.7dpublic pockev+1.0dcheck available+19dagent stopped
+5d
+10d
+15d
+20d

description

Yonyou U8 Cloud's FileManageServlet is affected by unsafe Java object deserialization. A remote unauthenticated attacker may execute operating-system commands if they can reach the vulnerable servlet.

mitigation

Restrict access to FileManageServlet immediately, permitting only trusted administrative network sources. Apply a vendor update when available; no fixed version is recorded.

check
available
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.64%49th percentile
agent run time
26m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-09-15 16:43Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
+0m
Δ to kevAttacks confirmed in the real world.
0d

outcome

Contextual check: a technique exists and was validated, but no deterministic check could cover this one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-09-15
    vulncheck_kev: trigger signal, started the run
    https://vulncheck.com/cve/CVE-2023-54398
  2. 2026-09-15 00:00Z
  3. 2026-09-15 16:43Z
  4. 2026-10-11 23:34Z

this entry in the feed

GET /api/v1/feed/CVE-2023-54398

{
  "etk_id": "ETK-2026-507",
  "cve_id": "CVE-2023-54398",
  "display_id": "CVE-2023-54398",
  "ghsa_id": "GHSA-r89p-qrrf-vpmc",
  "euvd_id": "EUVD-2023-60691",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unauthenticated Java deserialization in U8 Cloud FileManageServlet",
  "summary": "Yonyou U8 Cloud's FileManageServlet is affected by unsafe Java object deserialization. A remote unauthenticated attacker may execute operating-system commands if they can reach the vulnerable servlet.",
  "mitigation": "Restrict access to FileManageServlet immediately, permitting only trusted administrative network sources. Apply a vendor update when available; no fixed version is recorded.",
  "vendor": "Yonyou",
  "product": "U8 Cloud",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "1.0",
        "2.0",
        "2.1",
        "2.3",
        "2.5",
        "2.6",
        "2.65",
        "2.7",
        "3.0",
        "3.1",
        "3.2",
        "3.5",
        "3.6",
        "3.6sp"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "U8 Cloud",
      "purl": null
    }
  ],
  "cwes": [
    502
  ],
  "cvss_score": 9.8,
  "cvss_src": "nvd",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": 0.0064,
  "epss_percentile": 0.4988,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 25.956596683333334,
  "t0_at": "2026-09-15T16:43:06.574000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-03T23:26:46.776455+00:00",
      "days": 18.28032641730324,
      "is_lower_bound": false,
      "measured_at": "2026-09-15T16:43:06.574000+00:00",
      "url": null
    },
    "kev": {
      "at": "2026-09-15T00:00:00+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-15T16:43:06.574000+00:00",
      "precision": "day",
      "url": "https://vulncheck.com/cve/CVE-2023-54398"
    },
    "public_poc": {
      "at": "2026-09-15T16:43:06.574000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-15T16:43:06.574000+00:00",
      "url": "https://cn-sec.com/archives/2182384.html"
    },
    "trigger_signal": {
      "at": "2026-09-15T00:00:00+00:00",
      "days": -0.6966038657407407,
      "is_lower_bound": false,
      "measured_at": "2026-09-15T16:43:06.574000+00:00",
      "url": "https://vulncheck.com/cve/CVE-2023-54398"
    }
  }
}

published 2026-10-03 22:06Z
last change 2026-10-21 11:38Z

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