Vulnerability record · CVE-2017-9451 · published 6 June 2017

CVE-2017-9451: Flatcore cross-site scripting vulnerability

Flatcore · Flatcore

Cross site scripting (XSS) vulnerability in pages.edit_form.php in flatCore 1.4.6 allows remote attackers to inject arbitrary JavaScript via the PATH_INFO in an acp.php URL, due to use of unsanitized $_SERVER['PHP_SELF'] to generate URLs.

6.1 CVSS 3.0 Medium EPSS 0.74% · top 47.1% CWE-79 · Cross-site scripting

6.1CVSS 3.0 base score, v2 4.3

0.74%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References

17 Jun 2026Last modified by NVD

Description

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Flatcore Flatcore

References

Link	Tags
https://github.com/flatCore/flatCore-CMS/commit/f1b42b338693a9c240182e76ef2131057f2c2a87	Patch
https://github.com/flatCore/flatCore-CMS/issues/34	Issue TrackingThird Party Advisory
https://github.com/flatCore/flatCore-CMS/commit/f1b42b338693a9c240182e76ef2131057f2c2a87	Patch
https://github.com/flatCore/flatCore-CMS/issues/34	Issue TrackingThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2019-13961Flatcore cross-site request forgery vulnerabilityA CSRF vulnerability was found in flatCore before 1.5, leading to the upload of arbitrary .php files via acp/core/files.upload-script.php.EPSS 2.3%18 Jul 2019 7.2CVE-2020-17452Flatcore unrestricted file upload vulnerabilityflatCore before 1.5.7 allows upload and execution of a .php file by an admin.EPSS 2.4%9 Aug 2020 7.2CVE-2019-10652Flatcore unrestricted file upload vulnerabilityAn issue was discovered in flatCore 1.4.7. acp/acp.php allows remote authenticated administrators to upload arbitrary .php files, related to the addo…EPSS 7.0%30 Mar 2019 6.5CVE-2021-23837Flatcore sql injection vulnerabilityAn issue was discovered in flatCore before 2.0.0 build 139. A time-based blind SQL injection was identified in the selected_folder HTTP request body …EPSS 1.5%15 Jan 2021 5.4CVE-2021-40555Flatcore cross-site scripting vulnerabilityCross site scripting (XSS) vulnerability in flatCore-CMS 2.2.15 allows attackers to execute arbitrary code via description field on the new page crea…EPSS 0.44%16 Feb 2023 4.9CVE-2021-23835Flatcore improper input validation vulnerabilityAn issue was discovered in flatCore before 2.0.0 build 139. A local file disclosure vulnerability was identified in the docs_file HTTP request body p…EPSS 1.7%15 Jan 2021 4.8CVE-2021-23836Flatcore cross-site scripting vulnerabilityAn issue was discovered in flatCore before 2.0.0 build 139. A stored XSS vulnerability was identified in the prefs_smtp_psw HTTP request body paramet…EPSS 0.92%15 Jan 2021 4.8CVE-2021-23838Flatcore cross-site scripting vulnerabilityAn issue was discovered in flatCore before 2.0.0 build 139. A reflected XSS vulnerability was identified in the media_filter HTTP request body parame…EPSS 0.98%15 Jan 2021

Source: NIST National Vulnerability Database (record CVE-2017-9451), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.