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 5.4
FileGator: Missing authorization in GET /batchdownload allows cross-user retrieval of another user's archive
FileGator is a multi-user file manager. Prior to 7.15.0, GET /batchdownload in backend/Controllers/DownloadController.php uses batchDownloadStart() to stream a shared temporary archive selected by the request-supplied uniqid without checking that the current …
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Medium 4.8
sys_rand_get() silently returns an unwritten buffer when the entropy device is not ready
The entropy-device random number generator in subsys/random/random_entropy_device.c returned early with -ENODEV from rand_get() as soon as device_is_ready() failed, before reaching the non-cryptographic system-timer fallback further down the same function. Be…
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Low 3.1
Oray Pugongying X5 Pro Session ID session.lua session_get random values
A vulnerability was identified in Oray Pugongying X5 Pro up to 7.6.1. This impacts the function session_get of the file session.lua of the component Session ID Handler. The manipulation of the argument _user leads to insufficiently random values. The attack c…
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Medium 6.8
AdminNeo: CSRF Token Secret Recoverable from Single Observed Token, Enabling Cross-Site Request Forgery
### Summary AdminNeo's CSRF protection uses a BREACH-resistant XOR masking scheme, but the implementation transmits both the XOR mask and the masked value in every token. This allows any observer who sees a single CSRF token (via network sniffing, log files, …
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Medium 6.5
DNS resolver reuses a single UDP source port for all queries, easing off-path answer spoofing
The DNS stub resolver in subsys/net/lib/dns/resolve.c binds one UDP socket per configured server when the resolver context is initialised (dns_resolve_init_locked() -> register_dispatcher() -> dns_dispatcher_register()), with the local port left at 0 so the s…
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Medium 4.8CVE-2026-106074 Public exploit
A flaw in Node.js `crypto` causes the internal entropy caches used by `crypto.randomUUID()`, `crypto.randomUUIDv7()`, a…
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Medium 6.8
Goobi viewer: Predictable Replacement Password Allows Account Takeover After Password Reset
The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. Prior to version 26.05, when a password reset link is visited, the application generates a replacement password in a predictable way and emails it to the ac…
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Medium 6.5
Goobi viewer: Predictable Password Reset Token Allows Unauthorized Password Reset
The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. Prior to version 26.05, the password reset token is predictably based on the time of the reset request. An attacker who knows the target's email address can…
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High 8.3
XDG Desktop Portal: Drag-and-drop and copy-paste theft via predictable FileTransfer key
XDG Desktop Portal is a desktop integration portal. Prior to version 1.22.1, malicious sandboxed applications can use the FileTransfer.RetrieveFiles method to redirect drag-and-drop and copy-paste data targeted at other applications to itself. Some portals ge…
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Low 3.7
Linksys RE6250 Web Management strcmp random values
A vulnerability has been found in Linksys RE6250 1.0.04.001. This affects the function strcmp of the component Web Management Interface. The manipulation of the argument session_id leads to insufficiently random values. The attack may be initiated remotely. T…
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High 8.8
Use of insufficiently random values in Notifications in Google Chrome on on Android prior to 156.0.8078.47 allowed a re…
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High 7.5
IBM Concert Software Use of Insufficiently Random Values
IBM Concert 1.0 through 3.0.0 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information.
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Medium 5.3
Lightweight Cookie Notice <= 1.19 - Sensitive Information Exposure via W3TC_DYNAMIC_SECURITY Constant
The Lightweight Cookie Notice – Cookie Banner for Cookie Consent plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.19 This is due to the W3TC_DYNAMIC_SECURITY constant being hardcoded to a publicly kn…
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High 7.4
Omnispace Agora Project < 26.10.0 Predictable Default Password via uniqid()
Omnispace Agora Project before 26.10.0 contains an insecure randomness vulnerability that allows attackers to predict temporary or default account passwords generated by Txt::defaultPassword() using PHP's uniqid() function based on server time in microseconds…
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Medium 4.8
Predictable TCP initial sequence numbers when the RFC 6528 secret key generation fails silently in the Zephyr TCP stack
The RFC 6528 initial-sequence-number implementation in subsys/net/ip/tcp.c derived every TCP ISN from SHA-256(unique_key || four-tuple) plus a uptime-derived offset, where unique_key is a 128-bit secret filled once by sys_csrand_get(). The return value of tha…
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High 8.7
Predictable Media Stream Pre-Shared Key Vulnerability in TP-Link Tapo C325WB
TP-Link Tapo C325WB V2 generates the pre-shared key used by its local media streaming service with a time-seeded pseudo-random number generator, making the key predictable and recoverable. An unauthenticated attacker on the adjacent network can recover the ke…
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High 7.7
Dell Container Storage Modules, versions prior to 1.18.0 contain(s) an Use of Insufficiently Random Values vulnerabilit…
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High 8.5
Joplin: Unauthenticated account takeover via an attacker-chosen application-authorisation identifier
Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.13, packages/server/src/models/ApplicationModel.ts accepts a caller-chosen application authorization identifier, applications/:id/confirm bi…
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Medium 5.9
Isotope eCommerce through 2.9.10 Weak Order Identifier Generation
Isotope eCommerce through 2.9.10 derives order identifiers from uniqid() instead of a cryptographically secure source, allowing unauthenticated attackers to guess identifiers. Guest orders lack ownership verification, enabling attackers to access order detail…
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Medium 6.2
OpenEye Apex Network Video Recorder (NVR) firmware 3.2.9.376 uses an administrator password-reset unlock-code design th…
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Critical 9.1
Unauthenticated recovery of the Math.random() state behind OAuth tokens, authorization codes, client secrets and organization API keys
Postiz generates security-sensitive credentials using `Math.random()` instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these …
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Critical 9.6
Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass
All firmware versions of Lantronix SLC8000, SLC9000, EMG8500, EMG7500, SLB882, SLCx-03, and SLCx-02 contain an authentication bypass vulnerability in the web management portal that allows unauthenticated attackers to derive valid session tokens of logged-in u…
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High 7.4
AVideo Weak PRNG Activation Code Authentication Bypass
AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 uses a cryptographically weak pseudo-random number generator when creating account activation / login pairing codes. getRandomCode() in objects/functions.php derives the code entirely from uniqid(…
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Medium 6.5
AVideo Cryptographically Weak PRNG via uniqid Stream Key
AVideo through c3edcc274c389816d434acadac07ee78eaf330c1 uses cryptographically weak uniqid() values for RTMP publish keys in LiveTransmition, reducing key entropy to approximately one million possibilities per creation second. Attackers who know the channel c…
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High 7.7
GCS Bucket Squatting leading to RCE in Gemini Enterprise Agent Platform Python SDK
Bucket Squatting in Google Cloud Gemini Enterprise Agent Platform SDK for Python versions prior to 1.166.1 allows an attacker to achieve Remote Code Execution (RCE) and tenant-project token theft.
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High 7.5
A privacy issue was addressed with improved handling of identifiers. This issue is fixed in iOS 27 and iPadOS 27, macOS…
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Critical 9.1
OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption
OpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE). In versions 0.6.1 through 0.6.2.5, when cjose encrypts a JWE using an AES-CBC-HMAC content-encryption algorithm (`A128CBC-HS256`, `A192CBC-HS384`, or `A256CBC-HS512…
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High 7.5
The JWT signing secret in yfexam-exam v2.0 is derived from the username and the current month instead of a random serve…
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Medium 5.9
WWBN AVideo Weak PRNG Password Generation via External Login
WWBN AVideo generates passwords for external-login accounts using rand() instead of a cryptographic generator, producing only 31-bit integers. Attackers with access to password hashes can recover plaintext passwords in minutes through offline brute-force atta…
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Medium 5.4
IBM i is Affected By Multiple Vulnerabilities in Debug Server
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to bypass security restrictions due to predictable server seeds.
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Medium 5.9
Predictable Pseudorandom Number Generation via Webhook HMAC Secret Generation in Multiple WSO2 Products Allows Forged Event Payloads
The API Publisher component previously used a non-cryptographic pseudorandom number generator (PRNG) to create shared secrets for Webhook HMAC validation. This PRNG lacks sufficient entropy for security-sensitive operations, allowing a sophisticated attacker …
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High 8.1
ProfilePress WordPress Plugin < 4.17.2 Unauthenticated Arbitrary Plugin Installation RCE
ProfilePress (wp-user-avatar) WordPress plugin before 4.17.2 contains an unauthenticated remote code execution vulnerability that allows unauthenticated attackers to install and activate arbitrary plugins by brute-forcing a weak 32-bit connect token via the p…
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Low 2.1
AshAdmin ships a hardcoded CSP nonce, allowing nonce-based CSP bypass
Use of Insufficiently Random Values vulnerability in ash-project ash_admin ships a hardcoded, publicly known CSP nonce, defeating nonce-based Content-Security-Policy protection. When mounted without :csp_nonce_assign_key, AshAdmin.Router.ash_admin/2 defaulted…
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Low 3.7
TOTOLINK N600R Authentication cstecgi.cgi loginAuth random values
A vulnerability has been found in TOTOLINK N600R 4.3.0cu.7866_B20220506. This vulnerability affects the function loginAuth of the file /web_cste/cgi-bin/cstecgi.cgi of the component Authentication Handler. Such manipulation leads to insufficiently random valu…
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Critical 9.3
Bucket Squatting in Vertex AI Search for Commerce
A Predictable Resource Name vulnerability in BigQuery Import Staging in Google Cloud Vertex AI Search for Commerce versions prior to 2026-04-27 on Google Cloud Platform allows an attacker knowing the victim's project number to obtain read/write access to stag…
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Critical 9.1
TypeBot: Account takeover via brute-forceable 6-digit magic-link code
Typebot is an open-source chatbot builder. In self-hosted versions up to and including 3.17.1, the default passwordless email magic-link authentication is vulnerable to login-code brute forcing that leads to account takeover. The email provider overrides Next…
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Medium 6.8
Adminer before 5.4.3 CSRF Token Secret Recovery via XOR Masking
Adminer before 5.4.3 uses a CSRF token scheme that transmits both the XOR mask and the masked value in every token (format (rand XOR secret):rand), allowing anyone who observes a single CSRF token (e.g., via network sniffing, log files, Referrer header, or XS…
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High 7.5
Combodo iTop: Weak secret generation for inline image
Combodo iTop is a web based IT service management tool. Prior to 3.2.3, inline images that are accessible without being authenticated are protected by a weak 24-bit pseudo-random secret. This issue has been fixed in version 3.2.3.
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Medium —
Etherpad addressed weak token RNG, login timing, plugin path handling, API request handling
Fix: PR #7906 (ether/etherpad). A set of medium/low hardening fixes: - **Weak RNG for tokens (CWE-330):** author/session/readonly IDs were generated with `Math.random()` (client and server). Now use `crypto.getRandomValues`. - **Login timing / no failure dela…
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High 7.5
openssl_encrypt before 1.4.0 Weak PRNG Steganography Pixel Selection
openssl_encrypt versions before 1.4.0 use Python's non-cryptographic random module for steganographic pixel selection in the generate_pseudorandom_sequence function. Attackers who know the password can recover the Mersenne Twister state from approximately 624…