CVE-2021-21359— Denial of Service in Page Error Handling
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I. Basic Information for CVE-2021-21359
Vulnerability Information
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Vulnerability Title
Denial of Service in Page Error Handling
Source: NVD (National Vulnerability Database)
Vulnerability Description
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.25, 10.4.14, 11.1.1 requesting invalid or non-existing resources via HTTP triggers the page error handler which again could retrieve content to be shown as error message from another page. This leads to a scenario in which the application is calling itself recursively - amplifying the impact of the initial attack until the limits of the web server are exceeded. This is fixed in versions 9.5.25, 10.4.14, 11.1.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的递归
Source: NVD (National Vulnerability Database)
Vulnerability Title
TYPO3 安全漏洞
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 Core 存在安全漏洞，该漏洞允许远程攻击者执行拒绝服务(DoS)攻击。
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-2021-21359
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://packagist.org/packages/typo3/cms-corex_refsource_MISC
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-4p9g-qgx9-397px_refsource_CONFIRM
- https://typo3.org/security/advisory/typo3-core-sa-2021-005x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-21359
Same Patch Batch · TYPO3 · 2021-03-23 · 8 CVEs total
| CVE-2021-21355 | 8.6 HIGH | Unrestricted File Upload in Form Framework |
| CVE-2021-21357 | 8.3 HIGH | Broken Access Control in Form Framework |
| CVE-2021-21339 | 5.9 MEDIUM | Cleartext storage of session identifier |
| 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-674
V. Comments for CVE-2021-21359
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