Vulnerability-Lookup

GHSA-WMW3-3FV3-H54W

Vulnerability from github – Published: 2026-05-22 00:31 – Updated: 2026-06-24 21:10

Summary

Concrete CMS has a session-hardening bypass and allows password change without reauthorization

Details

Concrete CMS 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass. The user-profile edit controller passes the entire raw POST array to UserInfo::update() without field whitelisting resulting in password change without requiring the current password and also resulting in registered users able to disable the per-user-IP-pinning in the session validator which is meant to detect hijacking.

Severity

5.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "concrete5/concrete5"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.5.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-8327"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-24T21:10:52Z",
    "nvd_published_at": "2026-05-21T22:16:50Z",
    "severity": "MODERATE"
  },
  "details": "Concrete CMS 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass.\u00a0The user-profile edit controller passes the entire raw POST array to UserInfo::update() without field whitelisting resulting in password change without requiring the current password\u00a0 and also resulting in registered users able to disable the per-user-IP-pinning in the session validator which is meant to detect hijacking.",
  "id": "GHSA-wmw3-3fv3-h54w",
  "modified": "2026-06-24T21:10:52Z",
  "published": "2026-05-22T00:31:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8327"
    },
    {
      "type": "WEB",
      "url": "https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/concretecms/concretecms"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Concrete CMS has a session-hardening bypass and allows password change without reauthorization"
}

CVE-2026-8327 (GCVE-0-2026-8327)

Vulnerability from cvelistv5 – Published: 2026-05-21 21:15 – Updated: 2026-05-22 13:15

Title

Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass.

Summary

Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass. The user-profile edit controller passes the entire raw POST array to UserInfo::update() without field whitelisting resulting in password change without requiring the current password and also resulting in registered users able to disable the per-user-IP-pinning in the session validator which is meant to detect hijacking. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 5.3 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks 0x4c616e for reporting.

Severity

5.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-22 13:15 UTC

CWE

CWE-915 - Improperly controlled modification of Dynamically-Determined object attributes
CWE-620 - Unverified password change
CWE-269 - Improper Privilege Management

Assigner

ConcreteCMS CNA under the mitre root

CNA scorecard B 84/100 over 111 records in the last 180 days details

References

1 reference

URL	Tags
https://documentation.concretecms.org/9-x/develop…	release-notes

Impacted products

1 product

Vendor	Product	Version
Concrete CMS	Concrete CMS	Affected: 5 , ≤ 9.5.0 (git)

Credits

0x4c616e

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-8327",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T13:15:51.839847Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T13:15:58.343Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://github.com/concretecms/concretecms",
          "defaultStatus": "unaffected",
          "product": "Concrete CMS",
          "repo": "https://github.com/concretecms/concretecms",
          "vendor": "Concrete CMS",
          "versions": [
            {
              "lessThanOrEqual": "9.5.0",
              "status": "affected",
              "version": "5",
              "versionType": "git"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "0x4c616e"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan\u003eConcrete CMS below 9.5.0 and below is vulnerable to p\u003c/span\u003e\u003cspan\u003eassword change without reauthorization and session-hardening bypass.\u0026nbsp;\u003c/span\u003e\u003cspan\u003eThe user-profile edit controller passes the \u003c/span\u003e\u003cspan\u003eentire raw POST array\u003c/span\u003e\u003cspan\u003e to \u003c/span\u003e\u003ccode\u003eUserInfo::update()\u003c/code\u003e\u003cspan\u003e without field whitelisting resulting in password change without requiring the current password\u0026nbsp; and also resulting in registered users able to disable the per-user-IP-pinning in the session validator which is meant to detect hijacking.\u0026nbsp;\u0026nbsp;\u003c/span\u003e\u003cspan\u003eThe Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 5.3 with vector\u0026nbsp;CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks\u0026nbsp;0x4c616e for reporting.\u0026nbsp;\u003c/span\u003e\u003c/div\u003e"
            }
          ],
          "value": "Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass.\u00a0The user-profile edit controller passes the entire raw POST array to UserInfo::update() without field whitelisting resulting in password change without requiring the current password\u00a0 and also resulting in registered users able to disable the per-user-IP-pinning in the session validator which is meant to detect hijacking.\u00a0\u00a0The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 5.3 with vector\u00a0CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks\u00a00x4c616e for reporting."
        }
      ],
      "impacts": [
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          "capecId": "CAPEC-77",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-77 Manipulating User-Controlled Variables"
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      ],
      "metrics": [
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          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
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            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "descriptions": [
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              "cweId": "CWE-620",
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        },
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              "description": "CWE-269 Improper Privilege Management",
              "lang": "en",
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      "references": [
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          "tags": [
            "release-notes"
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          "url": "https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes"
        }
      ],
      "source": {
        "advisory": "https://hackerone.com/reports/3636712",
        "defect": [
          "HackerOne"
        ],
        "discovery": "EXTERNAL"
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      "title": "Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass.",
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    "assignerOrgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de",
    "assignerShortName": "ConcreteCMS",
    "cveId": "CVE-2026-8327",
    "datePublished": "2026-05-21T21:15:31.647Z",
    "dateReserved": "2026-05-11T14:21:53.569Z",
    "dateUpdated": "2026-05-22T13:15:58.343Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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