Common Weakness Enumeration
CWE-340
Allowed-with-ReviewGeneration of Predictable Numbers or Identifiers
Abstraction: Class · Status: Incomplete
The product uses a scheme that generates numbers or identifiers that are more predictable than required.
84 vulnerabilities reference this CWE, most recent first.
CVE-2025-40919 (GCVE-0-2025-40919)
Vulnerability from cvelistv5 – Published: 2025-07-16 14:04 – Updated: 2025-07-16 20:49
VLAI
EPSS
VEX
Title
Authen::DigestMD5 versions 0.01 through 0.04 for Perl generate the cnonce insecurely
Summary
Authen::DigestMD5 versions 0.01 through 0.02 for Perl generate the cnonce insecurely.
The cnonce (client nonce) is generated from an MD5 hash of the PID, the epoch time and the built-in rand function. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
According to RFC 2831, "The cnonce-value is an opaque quoted string value provided by the client and used by both client and server to avoid chosen plaintext attacks, and to provide mutual authentication. The security of the implementation depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy."
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-16 20:49 UTC
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SALVA | Authen::DigestMD5 |
Affected:
0.01 , ≤ 0.04
(custom)
|
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CVE-2025-40918 (GCVE-0-2025-40918)
Vulnerability from cvelistv5 – Published: 2025-07-16 14:00 – Updated: 2025-11-04 21:10
VLAI
EPSS
VEX
Title
Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely
Summary
Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely.
The cnonce (client nonce) is generated from an MD5 hash of the PID, the epoch time and the built-in rand function. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
According to RFC 2831, The cnonce-value is an opaque quoted string value provided by the client and used by both client and server to avoid chosen plaintext attacks, and to provide mutual authentication. The security of the implementation
depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-16 20:48 UTC
CWE
Assigner
References
6 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| EHUELS | Authen::SASL::Perl::DIGEST_MD5 |
Affected:
2.04 , ≤ 2.1800
(custom)
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CVE-2025-15604 (GCVE-0-2025-15604)
Vulnerability from cvelistv5 – Published: 2026-03-28 18:43 – Updated: 2026-04-01 14:13
VLAI
EPSS
VEX
Title
Amon2 versions before 6.17 for Perl use an insecure random_string implementation for security functions
Summary
Amon2 versions before 6.17 for Perl use an insecure random_string implementation for security functions.
In versions 6.06 through 6.16, the random_string function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes by concatenating a SHA-1 hash seeded with the built-in rand() function, the PID, and the high resolution epoch time. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
Before version 6.06, there was no fallback when /dev/urandom was not available.
Before version 6.04, the random_string function used the built-in rand() function to generate a mixed-case alphanumeric string.
This function may be used for generating session ids, generating secrets for signing or encrypting cookie session data and generating tokens used for Cross Site Request Forgery (CSRF) protection.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-01 14:12 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://metacpan.org/release/TOKUHIROM/Amon2-6.17… | |
| https://metacpan.org/release/TOKUHIROM/Amon2-6.17… | release-notes |
| https://github.com/tokuhirom/Amon/pull/135 | issue-tracking |
| https://security.metacpan.org/docs/guides/random-… | technical-description |
| http://www.openwall.com/lists/oss-security/2026/03/28/4 |
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CVE-2025-14602 (GCVE-0-2025-14602)
Vulnerability from cvelistv5 – Published: 2026-08-20 06:39 – Updated: 2026-08-20 15:18
VLAI
EPSS
VEX
Title
Weak File Name Generation in vsDesk
Summary
The application generates uploaded file names using a weak and predictable method based on the request timestamp. This allows a remote attacker to accurately guess or brute-force the generated filename within a short time window. An attacker can successfully locate and access uploaded files, which can be used to facilitate further attacks.
Apply patch from vendor https://vsdesk.ru/ . Versions 14.0101 and on have the patch.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:16 UTC
Assigner
References
1 reference
Impacted products
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CVE-2025-13044 (GCVE-0-2025-13044)
Vulnerability from cvelistv5 – Published: 2026-04-07 01:07 – Updated: 2026-04-07 16:24
VLAI
EPSS
VEX
Title
Multiple Vulnerabilities in IBM Concert Software
Summary
IBM Concert 1.0.0 through 2.2.0 creates temporary files with predictable names, which allows local users to overwrite arbitrary files via a symlink attack.
Severity
6.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-07 16:24 UTC
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7268620 | vendor-advisorypatch |
Impacted products
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CVE-2025-10148 (GCVE-0-2025-10148)
Vulnerability from cvelistv5 – Published: 2025-09-12 05:10 – Updated: 2026-09-15 06:02
VLAI
EPSS
VEX
Title
predictable WebSocket mask
Summary
curl's WebSocket code did not update the 32-bit mask pattern for each new
outgoing frame as the specification says. Instead it used a fixed mask that
persisted and was used throughout the entire connection.
A predictable mask pattern allows for a malicious server to induce traffic
between the two communicating parties that could be interpreted by an involved
proxy (configured or transparent) as genuine, real, HTTP traffic with content
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served to all users of that proxy.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-12 17:16 UTC
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Assigner
References
6 references
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| curl | curl |
Affected:
8.11.0 , < 8.14.2
(semver)
Affected: 8.15.0 , < 8.16.0 (semver) |
|
| curl | curl |
Affected:
d78e129d50b2d190f1c1bde2ad1f62f02f152db0 , < 84db7a9eae8468c0445b15aa806fa7fa806fa0f2
(git)
|
|
| curl | curl |
Affected:
8.15.0
Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 Affected: 8.12.1 Affected: 8.12.0 Affected: 8.11.1 Affected: 8.11.0 |
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CVE-2025-3449 (GCVE-0-2025-3449)
Vulnerability from cvelistv5 – Published: 2025-10-07 18:21 – Updated: 2025-10-08 13:15
VLAI
EPSS
VEX
Title
Weak Session Token used in Automation Runtime SDM
Summary
A Generation of Predictable Numbers or Identifiers vulnerability in the SDM component of B&R Automation Runtime versions before 6.4 may allow an unauthenticated network-based attacker to take over already established sessions.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-07 18:48 UTC
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| B&R Industrial Automation GmbH | Automation Runtime |
Affected:
6.0 , < 6.4
(custom)
Affected: 4 (custom) |
Date Public
2025-10-07 00:30
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CVE-2025-0218 (GCVE-0-2025-0218)
Vulnerability from cvelistv5 – Published: 2025-01-07 19:18 – Updated: 2025-11-03 17:31
VLAI
EPSS
VEX
Title
pgAgent scheduled batch job scripts are created in a predictable temporary directory potentially allowing a denial of service
Summary
When batch jobs are executed by pgAgent, a script is created in a temporary directory and then executed. In versions of pgAgent prior to 4.2.3, an insufficiently seeded random number generator is used when generating the directory name, leading to the possibility for a local attacker to pre-create the directory and thus prevent pgAgent from executing jobs, disrupting scheduled tasks.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-07 20:58 UTC
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Assigner
References
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CVE-2024-52299 (GCVE-0-2024-52299)
Vulnerability from cvelistv5 – Published: 2024-11-13 15:29 – Updated: 2024-11-14 13:58
VLAI
EPSS
VEX
Title
The PDF viewer macro allows accessing any attachment without access right checks
Summary
macro-pdfviewer is a PDF Viewer Macro for XWiki using Mozilla pdf.js. Any user with view right on XWiki.PDFViewerService can access any attachment stored in the wiki as the "key" that is passed to prevent this is computed incorrectly, calling skip on the digest stream doesn't update the digest. This is fixed in 2.5.6.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-14 13:57 UTC
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/xwikisas/macro-pdfviewer/secur… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| xwikisas | macro-pdfviewer |
Affected:
>= 1.6.2, < 2.5.6
|
|
| xwikisas | macro_pdfviewer |
Affected:
0 , ≤ 1.6.2
(custom)
Affected: 0 , < 2.5.6 (custom) cpe:2.3:a:xwikisas:macro_pdfviewer:*:*:*:*:*:*:*:* |
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CVE-2024-47945 (GCVE-0-2024-47945)
Vulnerability from cvelistv5 – Published: 2024-10-15 10:05 – Updated: 2025-11-03 22:21
VLAI
EPSS
VEX
Title
Predictable Session ID
Summary
The devices are vulnerable to session hijacking due to insufficient
entropy in its session ID generation algorithm. The session IDs are
predictable, with only 32,768 possible values per user, which allows
attackers to pre-generate valid session IDs, leading to unauthorized
access to user sessions. This is not only due to the use of an
(insecure) rand() function call but also because of missing
initialization via srand(). As a result only the PIDs are effectively
used as seed.
Severity
9.1 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-15 16:01 UTC
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://r.sec-consult.com/rittaliot | third-party-advisory |
| https://www.rittal.com/de-de/products/deep/3124300 | patch |
| http://seclists.org/fulldisclosure/2024/Oct/4 |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| RITTAL GmbH & Co. KG | IoT Interface & CMC III Processing Unit |
Affected:
<6.21.00.2
|
|
| rittal_gmbh_and_co.kg | iot_interface_and_cmc_iii_processing_unit |
Affected:
0 , < 6.21.00.2
(custom)
cpe:2.3:a:rittal_gmbh_and_co.kg:iot_interface_and_cmc_iii_processing_unit:*:*:*:*:*:*:*:* |
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.