CVE-2021-21340

Cross-Site Scripting in Content Preview

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 10.4.14, 11.1.1 it has been discovered that database fields used as _descriptionColumn_ are vulnerable to cross-site scripting when their content gets previewed. A valid backend user account is needed to exploit this vulnerability. This is fixed in versions 10.4.14, 11.1.1 .

TYPO3 es un sistema de gestión de contenidos web de código abierto basado en PHP. En TYPO3 versiones anteriores a la 10.4.14, 11.1.1 se ha descubierto que los campos de la base de datos utilizados como _descriptionColumn_ son vulnerables al cross-site scripting cuando su contenido se previsualiza. Se necesita una cuenta de usuario válida para explotar esta vulnerabilidad. Esto se ha corregido en las versiones 10.4.14, 11.1.1

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-22 CVE Reserved
2021-03-23 CVE Published
2023-03-08 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (3)

URL	Tag	Source
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-fjh3-g8gq-9q92	Third Party Advisory
https://packagist.org/packages/typo3/cms-backend	Release Notes

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://typo3.org/security/advisory/typo3-core-sa-2021-007	2021-03-26

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Typo3 Search vendor "Typo3"		Typo3 Search vendor "Typo3" for product "Typo3"				>= 10.0.0 < 10.4.14 Search vendor "Typo3" for product "Typo3" and version " >= 10.0.0 < 10.4.14"		-		Affected
Typo3 Search vendor "Typo3"		Typo3 Search vendor "Typo3" for product "Typo3"				>= 11.0.0 < 11.1.1 Search vendor "Typo3" for product "Typo3" and version " >= 11.0.0 < 11.1.1"		-		Affected