Yii
CVE-2021-3689
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Verified random number generation
|
| Impact | CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system. |
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Alert meAnalysisAI
yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in composer
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified under CWE-1241. yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator Affected products include: Yiiframework Yii.
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Affected Products (CPE)NVD
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In yiisoft/yii2 version 2.0.48, the base Component class contains a vulnerability where the `__set()` magic method does
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`yiisoft/yii` before version 1.1.27 are vulnerable to Remote Code Execution (RCE) if the application calls `unserialize(
Yii 2.x before 2.0.15 allows remote attackers to execute arbitrary LUA code via a variant of the CVE-2018-7269 attack in
The findByCondition function in framework/db/ActiveRecord.php in Yii 2.x before 2.0.15 allows remote attackers to conduc
A vulnerability, which was classified as critical, has been found in yiisoft Yii2 up to 2.0.45. Rated medium severity (C
A vulnerability, which was classified as critical, was found in yiisoft Yii2 up to 2.0.39. Rated medium severity (CVSS 5
yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator. Rated medium severity (CVSS 5.3), this vu
Yii 2.x before 2.0.15 allows remote attackers to inject unintended search conditions via a variant of the CVE-2018-7269
Exploit-DB