Vulnerability-Lookup

CVE-2026-91751 (GCVE-0-2026-91751)

Vulnerability from cvelistv5 – Published: 2026-09-15 00:35 – Updated: 2026-09-15 19:06

Title

Flextype CMS through 1.0.0-alpha.3 Path Traversal via Entries REST API

Summary

Flextype CMS through 1.0.0-alpha.3 fails to properly validate id and new_id parameters in the Entries REST API, allowing API token holders to read, create, or overwrite files outside the entries directory. Attackers can use traversal sequences in API requests to escape the project entries directory and manipulate arbitrary files and directories on the filesystem.

Severity

7.2 (High)


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

8.3 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 19:05 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/flextype/flextype/issues/596	issue-tracking
https://github.com/flextype/flextype	product
https://github.com/flextype/flextype/blob/v1.0.0-…	technical-description
https://www.vulncheck.com/advisories/flextype-cms…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
flextype	flextype	Affected: 0 , ≤ 1.0.0-alpha.3 (semver)	guessed

Date Public

2026-09-05 00:00

Credits

Vimalatithyann S

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-91751

Vulnerability from fkie_nvd - Published: 2026-09-15 01:16 - Updated: 2026-09-15 19:17

Severity

8.3 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/flextype/flextype
	disclosure@vulncheck.com	https://github.com/flextype/flextype/blob/v1.0.0-alpha.3/src/flextype/core/Entries/Entries.php#L856-L906
	disclosure@vulncheck.com	https://github.com/flextype/flextype/issues/596
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/flextype-cms-through-1.0.0-alpha.3-path-traversal-via-entries-rest-api
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/flextype/flextype/issues/596

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-63H9-H8W7-V6FR

Vulnerability from github – Published: 2026-09-15 03:30 – Updated: 2026-09-15 03:30

Details

Severity

8.3 (High)


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

7.2 (High)


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

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-91751"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-15T01:16:54Z",
    "severity": "HIGH"
  },
  "details": "Flextype CMS through 1.0.0-alpha.3 fails to properly validate id and new_id parameters in the Entries REST API, allowing API token holders to read, create, or overwrite files outside the entries directory. Attackers can use traversal sequences in API requests to escape the project entries directory and manipulate arbitrary files and directories on the filesystem.",
  "id": "GHSA-63h9-h8w7-v6fr",
  "modified": "2026-09-15T03:30:29Z",
  "published": "2026-09-15T03:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91751"
    },
    {
      "type": "WEB",
      "url": "https://github.com/flextype/flextype/issues/596"
    },
    {
      "type": "WEB",
      "url": "https://github.com/flextype/flextype"
    },
    {
      "type": "WEB",
      "url": "https://github.com/flextype/flextype/blob/v1.0.0-alpha.3/src/flextype/core/Entries/Entries.php#L856-L906"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/flextype-cms-through-1.0.0-alpha.3-path-traversal-via-entries-rest-api"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/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	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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-91751 (GCVE-0-2026-91751)

FKIE_CVE-2026-91751

GHSA-63H9-H8W7-V6FR

Tags

Sightings

Nomenclature