CVE-2021-21357— Broken Access Control in Form Framework
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I. Basic Information for CVE-2021-21357
Vulnerability Information
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Vulnerability Title
Broken Access Control in Form Framework
Source: NVD (National Vulnerability Database)
Vulnerability Description
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 8.7.40, 9.5.25, 10.4.14, 11.1.1 due to improper input validation, attackers can by-pass restrictions of predefined options and submit arbitrary data in the Form Designer backend module of the Form Framework. In the default configuration of the Form Framework this allows attackers to explicitly allow arbitrary mime-types for file uploads - however, default _fileDenyPattern_ successfully blocked files like _.htaccess_ or _malicious.php_. Besides that, attackers can persist those files in any writable directory of the corresponding TYPO3 installation. A valid backend user account with access to the form module is needed to exploit this vulnerability. This is fixed in versions 8.7.40, 9.5.25, 10.4.14, 11.1.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
TYPO3 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TYPO3是瑞士TYPO3（Typo3）协会的一套免费开源的内容管理系统(框架)(CMS/CMF)。 TYPO3 存在安全漏洞，目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-21357
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://packagist.org/packages/typo3/cms-formx_refsource_MISC
- https://typo3.org/security/advisory/typo3-core-sa-2021-003x_refsource_MISC
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3vg7-jw9m-pc3fx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-21357
Same Patch Batch · TYPO3 · 2021-03-23 · 8 CVEs total
| CVE-2021-21355 | 8.6 HIGH | Unrestricted File Upload in Form Framework |
| CVE-2021-21339 | 5.9 MEDIUM | Cleartext storage of session identifier |
| CVE-2021-21359 | 5.9 MEDIUM | Denial of Service in Page Error Handling |
| CVE-2021-21358 | 5.4 MEDIUM | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ty |
| CVE-2021-21340 | 5.4 MEDIUM | Cross-Site Scripting in Content Preview |
| CVE-2021-21370 | 5.4 MEDIUM | Cross-Site Scripting in Content Preview (CType menu) |
| CVE-2021-21338 | 4.7 MEDIUM | Open Redirection in Login Handling |
IV. Related Vulnerabilities
Same product: TYPO3.CMS
Same vendor: TYPO3
- CVE-2026-6553
TYPO3 CMS Stores Cleartext Password in User Settings Module - CVE-2026-4208
Authentication Bypass in extension "E-Mail MFA Provider" (mf - CVE-2026-4202
Broken Access Control in extension "Redirect Tab" - CVE-2026-1323
Insecure Deserialization in extension "Mailqueue" (mailqueue - CVE-2026-0895
Insecure Deserialization in extension "Mailqueue" (mailqueue
Same weakness: CWE-20
V. Comments for CVE-2021-21357
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