CVE-2017-16935

Status: ModifiedCritical (9.8)—Exploit

Severity9.8Critical · CVSS 3.0

Exploitation probability7.66 %higher than 95% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB

Ametys before 4.0.3 requires authentication only for URIs containing a /cms/ substring, which allows remote attackers to bypass intended access restrictions via a direct request to /plugins/core-ui/servercomm/messages.xml, as demonstrated by changing the admin password by obtaining account details via a users/search.json request, and then modifying the account via an editUser request.

CVSS

Base score: 9.8
Version: 3.0
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 7.66 %
Percentile among all scored CVEs: 95
Score date: 11/3/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · Ametys CMS 4.0.2 - Password Reset (11/7/2017)

Affected technologies (1)

Ametys — Ametys

CWEs

CWE-20

References

Show 4 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2017-16935",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
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          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "status": "affected",
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  "published": "2017-11-24T07:29:00.303",
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      "tags": [
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        "Technical Description",
        "Third Party Advisory"
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      "url": "https://issues.ametys.org/browse/RUNTIME-2582",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Ametys before 4.0.3 requires authentication only for URIs containing a /cms/ substring, which allows remote attackers to bypass intended access restrictions via a direct request to /plugins/core-ui/servercomm/messages.xml, as demonstrated by changing the admin password by obtaining account details via a users/search.json request, and then modifying the account via an editUser request."
    },
    {
      "lang": "es",
      "value": "Ametys en versiones anteriores a la 4.0.3 solo requiere autenticación para URI que contienen una subcadena /cms/. Esto permite que atacantes remotos omitan las restricciones de acceso planeadas mediante una petición directa a /plugins/core-ui/servercomm/messages.xml, tal y como demuestra el cambio de la contraseña de administrador obteniendo los detalles de la cuenta mediante una petición users/search.json y modificando la cuenta mediante una petición editUser."
    }
  ],
  "lastModified": "2026-06-17T01:10:10.593",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ametys:ametys:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A37995E5-E1D7-46A1-B9E9-D9D274FD9801",
              "versionEndExcluding": "4.0.3"
            }
          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "cve@mitre.org"
}