// For flags

CVE-2021-41264

UUPSUpgradeable vulnerability in OpenZeppelin Contracts

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

OpenZeppelin Contracts is a library for smart contract development. In affected versions upgradeable contracts using `UUPSUpgradeable` may be vulnerable to an attack affecting uninitialized implementation contracts. A fix is included in version 4.3.2 of `@openzeppelin/contracts` and `@openzeppelin/contracts-upgradeable`. For users unable to upgrade; initialize implementation contracts using `UUPSUpgradeable` by invoking the initializer function (usually called `initialize`). An example is provided [in the forum](https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301).

OpenZeppelin Contracts es una biblioteca para el desarrollo de contratos inteligentes. En las versiones afectadas, los contratos actualizables que usan "UUPSUpgradeable" pueden ser vulnerables a un ataque que afecta a los contratos de implementación no inicializada. Se incluye una corrección en la versión 4.3.2 de "@openzeppelin/contracts" y "@openzeppelin/contracts-upgradeable". Para usuarios que no puedan actualizar; inicialice los contratos de implementación usando "UUPSUpgradeable" al invocar la función inicializadora (normalmente llamada "initialize"). Se proporciona un ejemplo [en el foro](https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301)

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-09-15 CVE Reserved
  • 2021-11-12 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-12-17 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-665: Improper Initialization
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Openzeppelin
Search vendor "Openzeppelin"
 Contracts
Search vendor "Openzeppelin" for product "Contracts"
 >= 4.1.0 < 4.3.2
Search vendor "Openzeppelin" for product "Contracts" and version " >= 4.1.0 < 4.3.2"
node.js
Affected