CVE-2020-26216

Cross-Site Scripting in TYPO3 Fluid

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

TYPO3 Fluid before versions 2.0.8, 2.1.7, 2.2.4, 2.3.7, 2.4.4, 2.5.11 and 2.6.10 is vulnerable to Cross-Site Scripting. Three XSS vulnerabilities have been detected in Fluid: 1. TagBasedViewHelper allowed XSS through maliciously crafted additionalAttributes arrays by creating keys with attribute-closing quotes followed by HTML. When rendering such attributes, TagBuilder would not escape the keys. 2. ViewHelpers which used the CompileWithContentArgumentAndRenderStatic trait, and which declared escapeOutput = false, would receive the content argument in unescaped format. 3. Subclasses of AbstractConditionViewHelper would receive the then and else arguments in unescaped format. Update to versions 2.0.8, 2.1.7, 2.2.4, 2.3.7, 2.4.4, 2.5.11 or 2.6.10 of this typo3fluid/fluid package that fix the problem described. More details are available in the linked advisory.

TYPO3 Fluid anterior a versiones 2.0.8, 2.1.7, 2.2.4, 2.3.7, 2.4.4, 2.5.11 y 2.6.10, es vulnerable a un ataque de tipo Cross-Site Scripting. Se han detectado tres vulnerabilidades de tipo XSS en Fluid: 1. TagBasedViewHelper permitía un ataque de tipo XSS por medio de matrices de additionalAttributes creadas maliciosamente mediante la creación de claves con comillas de cierre de atributos seguidas de HTML. Al representar tales atributos, TagBuilder no escapaba de las claves. 2. ViewHelpers que usaba el rasgo CompileWithContentArgumentAndRenderStatic, y que declaraba escapeOutput = false, recibirían el argumento de contenido en formato sin escape. 3. Las subclases de AbstractConditionViewHelper recibirían los argumentos then y else en formato sin escape. Actualice a las versiones 2.0.8, 2.1.7, 2.2.4, 2.3.7, 2.4.4, 2.5.11 o 2.6.10 de este paquete typo3fluid/fluid que corrige el problema descrito. Mas detalles están disponibles en el aviso vinculado

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-10-01 CVE Reserved
2020-11-17 CVE Published
2024-08-04 CVE Updated
2024-08-04 EPSS Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

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

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://github.com/TYPO3/Fluid/security/advisories/GHSA-hpjm-3ww5-6cpf	2024-08-04
https://typo3.org/security/advisory/typo3-core-sa-2020-009	2024-08-04

URL	Date	SRC
https://github.com/TYPO3/Fluid/commit/f20db4e74cf9803c6cffca2ed2f03e1b0b89d0dc	2020-12-02

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Typo3 Search vendor "Typo3"		Fluid Search vendor "Typo3" for product "Fluid"				< 2.0.8 Search vendor "Typo3" for product "Fluid" and version " < 2.0.8"		-		Affected
Typo3 Search vendor "Typo3"		Fluid Search vendor "Typo3" for product "Fluid"				>= 2.1.0 < 2.1.7 Search vendor "Typo3" for product "Fluid" and version " >= 2.1.0 < 2.1.7"		-		Affected
Typo3 Search vendor "Typo3"		Fluid Search vendor "Typo3" for product "Fluid"				>= 2.2.0 < 2.2.4 Search vendor "Typo3" for product "Fluid" and version " >= 2.2.0 < 2.2.4"		-		Affected
Typo3 Search vendor "Typo3"		Fluid Search vendor "Typo3" for product "Fluid"				>= 2.3.0 < 2.3.7 Search vendor "Typo3" for product "Fluid" and version " >= 2.3.0 < 2.3.7"		-		Affected
Typo3 Search vendor "Typo3"		Fluid Search vendor "Typo3" for product "Fluid"				>= 2.4.0 < 2.4.4 Search vendor "Typo3" for product "Fluid" and version " >= 2.4.0 < 2.4.4"		-		Affected
Typo3 Search vendor "Typo3"		Fluid Search vendor "Typo3" for product "Fluid"				>= 2.5.0 < 2.5.11 Search vendor "Typo3" for product "Fluid" and version " >= 2.5.0 < 2.5.11"		-		Affected
Typo3 Search vendor "Typo3"		Fluid Search vendor "Typo3" for product "Fluid"				>= 2.6.0 < 2.6.10 Search vendor "Typo3" for product "Fluid" and version " >= 2.6.0 < 2.6.10"		-		Affected