CVE-2021-22963

fastify-static: open redirect via an URL with double slash followed by a domain

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A redirect vulnerability in the fastify-static module version < 4.2.4 allows remote attackers to redirect users to arbitrary websites via a double slash // followed by a domain: http://localhost:3000//google.com/%2e%2e.The issue shows up on all the fastify-static applications that set redirect: true option. By default, it is false.

Una vulnerabilidad de redirección en el módulo fastify-static versiones anteriores a 4.2.4, permite a atacantes remotos redirigir a usuarios a sitios web arbitrarios por medio de una doble barra // seguida de un dominio: http://localhost:3000//google.com/%2e%2e. El problema aparece en todas las aplicaciones fastify-static que establecen la opción redirect: true. Por defecto, es false

*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

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-06 CVE Reserved
2021-10-14 CVE Published
2024-08-03 CVE Updated
2024-08-03 First Exploit
2024-10-17 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://hackerone.com/reports/1354255	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2021-22963	2022-03-03
https://bugzilla.redhat.com/show_bug.cgi?id=2015152	2022-03-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Fastify Search vendor "Fastify"		Fastify-static Search vendor "Fastify" for product "Fastify-static"				< 4.2.4 Search vendor "Fastify" for product "Fastify-static" and version " < 4.2.4"		-		Affected