Weakness (CWE)
CWE-330: Use of Insufficiently Random Values
The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.
How to prevent it (3 mitigations)
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Architecture and Design
Use a well-vetted algorithm that is currently considered to be strong by experts in the field, and select well-tested implementations with adequate length seeds.
In general, if a pseudo-random number generator is not advertised as being cryptographically secure, then it is probably a statistical PRNG and should not be used in security-sensitive contexts.
Pseudo-random number generators can produce predictable numbers if the generator is known and the seed can be guessed. A 256-bit seed is a good starting point for producing a "random enough" number.
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Implementation
Consider a PRNG that re-seeds itself as needed from high quality pseudo-random output sources, such as hardware devices.
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Architecture and Design, Requirements
Use products or modules that conform to FIPS 140-2 [REF-267] to avoid obvious entropy problems. Consult FIPS 140-2 Annex C ("Approved Random Number Generators").
Source: MITRE CWE-330
249 results · Feed
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Medium 6.5
Insecure Credential Generation for Solax Power Pocket WiFi models MQTT Cloud Connection
When connecting to the Solax Cloud MQTT server the username is the "registration number", which is the 10 character string printed on the SolaX Power Pocket device / the QR code on the device. The password is derived from the "registration number" using a pro…
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Critical 9.5
NervesHub has Insufficient Token Entropy that Allows Authentication Bypass via Brute Force
NervesHub is a web service that allows users to manage over-the-air (OTA) firmware updates of devices in the field. A vulnerability present starting in version 1.0.0 and prior to version 2.3.0 allowed attackers to brute-force user API tokens due to the predic…
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Low —
Triton VM has a Soundness Vulnerability due to Improper Sampling of Randomness
In affected versions of Triton VM, the verifier failed to correctly sample randomness in the FRI sub-protocol. Malicious provers can exploit this to craft proofs for arbitrary statements that this verifier accepts as valid, undermining soundness. Protocols th…
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High 8.2
Jervis has a Weak Random for Timing Attack Mitigation
Jervis is a library for Job DSL plugin scripts and shared Jenkins pipeline libraries. Prior to 2.2, Jervis uses java.util.Random() which is not cryptographically secure for timing attack mitigation. This vulnerability is fixed in 2.2.
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Medium 6.5
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.9.5 - Unauthenticated Sensitive Information Exposure
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.9.5 via the hash() function due to use of a hardcoded fall-back salt.…
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Medium 5.5
libtpms returns wrong initialization vector when certain symmetric ciphers are used
libtpms, a library that provides software emulation of a Trusted Platform Module, has a flaw in versions 0.10.0 and 0.10.1. The commonly used integration of libtpms with OpenSSL 3.x contained a vulnerability related to the returned IV (initialization vector) …
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Medium 5.3
Login Lockdown & Protection <= 2.14 - IP Block Bypass
The Login Lockdown & Protection plugin for WordPress is vulnerable to IP Block Bypass in all versions up to, and including, 2.14. This is due to $unblock_key key being insufficiently random allowing unauthenticated users, with access to an administrative user…
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Critical 9.3
Predictable Default Wi-Fi Password in EZCast Pro II Dongle
Predictable default Wi-Fi Password in Access Point functionality in EZCast Pro II before version 1.17478.177 allows attackers in Wi-Fi range to gain access to the dongle by calculating the default password from observable device identifiers
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Medium 4.8
Nextcloud Calendar app used predictable proposal participant tokens
Nextcloud Calendar is a calendar app for Nextcloud. Prior to 6.0.3, the Calendar app generates participant tokens for meeting proposals using a hash function, allowing an attacker to compute valid participant tokens, which allowed them to request details and …
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High 7.1
gokey allows secret recovery from a seed file without the master password
In gokey versions <0.2.0, a flaw in the seed decryption logic resulted in passwords incorrectly being derived solely from the initial vector and the AES-GCM authentication tag of the key seed. This issue has been fixed in gokey version 0.2.0. This is a breaki…
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High 7.5
An issue in Technitium through v13.2.2 enables attackers to conduct a DNS cache poisoning attack and inject fake respon…
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High 7.5
An authentication bypass vulnerability has been identified in the IFTTT integration feature. A remote, authenticated at…
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High 7.5
RNP 0.18.0 Vulnerable PKESK session keys
In RNP version 0.18.0 a refactoring regression causes the symmetric session key used for Public-Key Encrypted Session Key (PKESK) packets to be left uninitialized except for zeroing, resulting in it always being an all-zero byte array. Any data encrypted usin…
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Medium 5.3
Hydra Booking – All in One Appointment Booking System | Appointment Scheduling, Booking Calendar & WooCommerce Bookings <= 1.1.27 - Unauthenticated Arbitrary Booking Cancellation via Weak Hash Generation
The Hydra Booking — Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to unauthorized booking cancellation in all versions up to, and including, 1.1.27. This is due to the plugin's "tfhb_meeting_form_submit_callback" function using …
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Medium 6.8
Reuse of session IDs in oatpp-mcp leads to session hijacking and prompt hijacking by remote attackers
The MCP SSE endpoint in oatpp-mcp returns an instance pointer as the session ID, which is not unique nor cryptographically secure. This allows network attackers with access to the oatpp-mcp server to guess future session IDs and hijack legitimate client MCP s…
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Medium 5.3
Banhammer – Monitor Site Traffic, Block Bad Users and Bots <= 3.4.8 - Unauthenticated Protection Mechanism Bypass
The Banhammer – Monitor Site Traffic, Block Bad Users and Bots plugin for WordPress is vulnerable to Blocking Bypass in all versions up to, and including, 3.4.8. This is due to a site-wide “secret key” being deterministically generated from a constant charact…
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Low 3.7
youth-is-as-pale-as-poetry e-learning JWT Token JwtUtils.java encryptSecret random values
A vulnerability has been found in youth-is-as-pale-as-poetry e-learning 1.0. Impacted is the function encryptSecret of the file e-learning-master\exam-api\src\main\java\com\yf\exam\ability\shiro\jwt\JwtUtils.java of the component JWT Token Handler. The manipu…
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Critical 9.4CVE-2025-7783 Public exploit
Usage of unsafe random function in form-data for choosing boundary
Use of Insufficiently Random Values vulnerability in form-data allows HTTP Parameter Pollution (HPP). This vulnerability is associated with program files lib/form_data.Js. This issue affects form-data: < 2.5.4, 3.0.0 - 3.0.3, 4.0.0 - 4.0.3.
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Low 3.7
D-Link DCS-6517/DCS-7517 Root Password Generation httpd generate_pass_from_mac entropy
A vulnerability classified as problematic was found in D-Link DCS-6517 and DCS-7517 up to 2.02.0. Affected by this vulnerability is the function generate_pass_from_mac of the file /bin/httpd of the component Root Password Generation Handler. The manipulation …
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Low 1.7
Vantage6 Server JWT secret not cryptographically secure
vantage6 is an open-source infrastructure for privacy preserving analysis. The JWT secret key in the vantage6 server is auto-generated unless defined by the user. The auto-generated key is a UUID1, which is not cryptographically secure as it is predictable to…
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Low 3.1
Poor quality of randomness in authorization tokens
The Media Server’s authorization tokens have a poor quality of randomness. An attacker may be able to guess the token of an active user by computing plausible tokens.
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Critical 9.8
PSW Front-end Login & Registration <= 1.12 - Insufficiently Random Values to Unauthenticated Account Takeover/Privilege Escalation via customer_registration Function
The PSW Front-end Login & Registration plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.12 via the customer_registration() function. This is due to the use of a weak, low-entropy OTP mechanism in the forget() …
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Low 3.7
Tmall Demo Payment Identifier pay random values
A vulnerability, which was classified as problematic, was found in Tmall Demo up to 20250505. This affects an unknown part of the file /tmall/order/pay/ of the component Payment Identifier Handler. The manipulation leads to insufficiently random values. It is…
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Low 2.6
vLLM AIBrix Prefix Caching hash.go random values
A vulnerability has been found in vLLM AIBrix 0.2.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file pkg/plugins/gateway/prefixcacheindexer/hash.go of the component Prefix Caching. The manipulation leads to…
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Medium 6.5
SunGrow iSolarCloud Android app V2.1.6.20241017 and prior uses an insecure AES key to encrypt client data (insufficient…
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Medium 6.9
Identifiable Header Values In Fuchsia Leading To Tracking of The User
Vulnerabilities in the algorithms used by Fuchsia to populate network protocol header fields, specifically the TCP ISN, TCP timestamp, TCP and UDP source ports, and IPv4/IPv6 fragment ID allow for these values to be guessed under circumstances
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Medium 6.8
Undici Uses Insufficiently Random Values
Undici is an HTTP/1.1 client. Starting in version 4.5.0 and prior to versions 5.28.5, 6.21.1, and 7.2.3, undici uses `Math.random()` to choose the boundary for a multipart/form-data request. It is known that the output of `Math.random()` can be predicted if s…
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High 8.1
WPC Shop as a Customer for WooCommerce <= 1.2.8 - Authentication Bypass Due to Insufficiently Unique Key
The WPC Shop as a Customer for WooCommerce plugin for WordPress is vulnerable to account takeover and privilege escalation in all versions up to, and including, 1.2.8. This is due to the 'generate_key' function not producing a sufficiently random value. This …
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Medium 5.3
Avahi: avahi wide-area dns uses constant source port
A flaw was found in Avahi-daemon, which relies on fixed source ports for wide-area DNS queries. This issue simplifies attacks where malicious DNS responses are injected.
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High 8.7
codechecker authentication method confusion vulnerability allows logging in as the built-in root user from an external service
CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. Authentication method confusion allows logging in as the built-in root user from an external service. The built-in root user up until 6.24.1…
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Medium 6.8
Cisco Adaptive Security Appliance and Firepower Threat Defense Software VPN Authentication DoS Vulnerability
A vulnerability in the session authentication functionality of the Remote Access SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to prevent u…
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High 7.5
Suricata http/byte-ranges: missing hashtable random seed leads to potential DoS
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to version 7.0.7, missing initialization of the random seed for "thash" leads to byte-range tracking having predictable hash table beha…
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High 7.5
Suricata datasets: missing hashtable random seed leads to potential DoS
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to version 7.0.7, missing initialization of the random seed for "thash" leads to datasets having predictable hash table behavior. This …
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High 7.5
An issue was discovered in AdaCore ada_web_services 20.0 allows an attacker to escalate privileges and steal sessions v…
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Medium 5.3
Predictable seed generation after ECU reset
Predictable seed generation in the security access mechanism of UDS in the Blind Spot Protection Sensor ECU in Nissan Altima (2022) allows attackers to predict the requested seeds and bypass security controls via repeated ECU resets and seed requests.
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Medium 6.5
OAuth library for nim allows insecure generation of state values by generateState - entropy too low and uses regular PRNG instead of CSPRNG
In the OAuth library for nim prior to version 0.11, the `state` values generated by the `generateState` function do not have sufficient entropy. These can be successfully guessed by an attacker allowing them to perform a CSRF vs a user, associating the user's…
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Medium 6.3
Arbitrary User Activation
Insufficiently random values for generating activation token in FIWARE Keyrock <= 8.4 allow attackers to activate accounts of any user by predicting the token for the activation link.
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Low 3.7
projectsend Password Reset Token functions.php generate_random_string random values
A vulnerability, which was classified as problematic, was found in projectsend up to r1605. Affected is the function generate_random_string of the file includes/functions.php of the component Password Reset Token Handler. The manipulation leads to insufficien…
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High 7.1
Use of Insufficiently Random Values in Core
Information disclosure when ASLR relocates the IMEM and Secure DDR portions as one chunk in virtual address space.
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High 7.6
iDRAC9, versions prior to 7.00.00.172 for 14th Generation and 7.10.50.00 for 15th and 16th Generations, contains a sess…