Vulnerability-Lookup

CVE-2026-3452 (GCVE-0-2026-3452)

Vulnerability from cvelistv5 – Published: 2026-03-04 01:49 – Updated: 2026-03-04 16:02

Title

Concrete CMS below 9.4.8 is vulnerable to stored deserialization leading to RCE in the Express Entry List block.

Summary

Concrete CMS below version 9.4.8 is vulnerable to Remote Code Execution by stored PHP object injection into the Express Entry List block via the columns parameter. An authenticated administrator can store attacker-controlled serialized data in block configuration fields that are later passed to unserialize() without class restrictions or integrity checks. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 8.9 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H. Thanks YJK ( @YJK0805 https://hackerone.com/yjk0805 ) of ZUSO ART https://zuso.ai/ for reporting.

Severity ?

8.9 (High)


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

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

ConcreteCMS

References

URL

Tags

	https://github.com/concretecms/concretecms/pull/1…
	https://documentation.concretecms.org/9-x/develop…

Impacted products

	Vendor	Product	Version
	Concrete CMS	Concrete CMS	Affected: 5 , < 9.4.8 (git)

Credits

YJK (@YJK0805) of ZUSO ART

Show details on NVD website

JSON

To clipboard

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GHSA-GJ26-W59C-29MF

Vulnerability from github – Published: 2026-03-04 03:31 – Updated: 2026-03-04 03:31

Details

Severity ?

8.9 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-3452"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-04T02:15:54Z",
    "severity": "HIGH"
  },
  "details": "Concrete CMS below version 9.4.8 is vulnerable to\u00a0Remote Code Execution by\u00a0stored PHP object injection into the Express Entry List block\u00a0via the columns parameter.\u00a0An authenticated administrator can store attacker-controlled serialized data in block configuration fields that are later passed to unserialize() without class restrictions or integrity checks.\u00a0The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 8.9 with vector\u00a0CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H. Thanks\u00a0YJK ( @YJK0805 https://hackerone.com/yjk0805 ) of  ZUSO ART https://zuso.ai/ \u00a0for reporting.",
  "id": "GHSA-gj26-w59c-29mf",
  "modified": "2026-03-04T03:31:34Z",
  "published": "2026-03-04T03:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3452"
    },
    {
      "type": "WEB",
      "url": "https://github.com/concretecms/concretecms/pull/12826/changes/167f16e4805d8ab546d2997c753ac21bf4854920:"
    },
    {
      "type": "WEB",
      "url": "https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
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      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-3452 (GCVE-0-2026-3452)

GHSA-GJ26-W59C-29MF

Tags

Sightings

Nomenclature