CVE-2026-9227

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Source
https://cve.org/CVERecord?id=CVE-2026-9227
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9227.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-9227
Published
2026-05-28T06:45:39Z
Modified
2026-10-21T03:00:14Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
GutenBee <= 2.20.1 - Authenticated (Author+) Arbitrary File Upload via wp_check_filetype_and_ext Filter
Details

The GutenBee – Gutenberg Blocks plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.20.1 via the gutenbee_file_and_ext_json function. This is due to a flawed strpos() substring check that only verifies whether the filename contains the string '.json' rather than confirming the filename ends with a .json extension, allowing double-extension filenames like shell.json.php to bypass validation. This makes it possible for authenticated attackers, with author-level access and above, to upload files that may be executable, which makes remote code execution possible.

Database specific 
{
    "cna_assigner":  "Wordfence",
    "cwe_ids":  [
        "CWE-434"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9227.json"
}
References

Affected packages

Git / github.com/cssigniter/gutenbee

Affected ranges

Type
GIT
Repo
https://github.com/cssigniter/gutenbee
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
bde934cdecf67a4de1d6548cc1fc6c59bc6690e5
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "last_affected":  "2.20.1"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "range":  [
                {
                    "fixed":  "bde934cdecf67a4de1d6548cc1fc6c59bc6690e5"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

2.*
2.10.0
2.10.1
2.10.2
2.10.3
2.10.4
2.10.5
2.10.6
2.11.0
2.11.1
2.12.0
2.12.1
2.12.2
2.12.3
2.12.4
2.12.5
2.13.0
2.13.1
2.14.0
2.15.0
2.16.0
2.16.1
2.17.0
2.17.1
2.17.2
2.17.3
2.17.4
2.18.0
2.18.1
2.19.0
2.19.1
2.20.0
2.20.1
2.8.0
2.8.1
2.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9227.json"