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Common Weakness Enumeration

CWE-204

Allowed

Observable Response Discrepancy

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.

341 vulnerabilities reference this CWE, most recent first.

CVE-2024-31870 (GCVE-0-2024-31870)

Vulnerability from cvelistv5 – Published: 2024-06-15 13:47 – Updated: 2024-08-22 18:03
VLAI
Title
IBM i information disclosure
Summary
IBM Db2 for i 7.2, 7.3, 7.4, and 7.5 supplies user defined table function is vulnerable to user enumeration by a local authenticated attacker, without having authority to the related *USRPRF objects. This can be used by a malicious actor to gather information about users that can be targeted in further attacks. IBM X-Force ID: 287174.
Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-15 19:38 UTC
CWE
  • CWE-204 - Response Discrepancy Information Exposure
Assigner
References
Impacted products
Vendor Product Version
IBM i Affected: 7.2, 7.3, 7.4, 7.5
    cpe:2.3:a:ibm:i:7.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.3:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*
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ibm db2_for_i Affected: 7.3
    cpe:2.3:a:ibm:db2_for_i:*:*:*:*:*:*:*:*
Create a notification for this product.
ibm db2_for_i Affected: 7.2
    cpe:2.3:a:ibm:db2_for_i:*:*:*:*:*:*:*:*
Create a notification for this product.
ibm db2_for_i Affected: 7.4
    cpe:2.3:a:ibm:db2_for_i:*:*:*:*:*:*:*:*
Create a notification for this product.
ibm db2_for_i Affected: 7.5
    cpe:2.3:a:ibm:db2_for_i:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Zoltan Panczel
Show details on NVD website
To clipboard 

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CVE-2024-28868 (GCVE-0-2024-28868)

Vulnerability from cvelistv5 – Published: 2024-03-20 20:07 – Updated: 2024-08-02 00:56
VLAI
Title
Umbraco possible user enumeration vulnerability
Summary
Umbraco is an ASP.NET content management system. Umbraco 10 prior to 10.8.4 with access to the native login screen is vulnerable to a possible user enumeration attack. This issue was fixed in version 10.8.5. As a workaround, one may disable the native login screen by exclusively using external logins.
Severity
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-21 15:34 UTC
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
umbraco Umbraco-CMS Affected: >= 10.0.0, < 10.8.5
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2024-28232 (GCVE-0-2024-28232)

Vulnerability from cvelistv5 – Published: 2024-04-01 16:42 – Updated: 2024-08-02 00:48
VLAI
Title
Username Enumeration in CasaOS via bypass of CVE-2024-24766
Summary
Go package IceWhaleTech/CasaOS-UserService provides user management functionalities to CasaOS. The Casa OS Login page has disclosed the username enumeration vulnerability in the login page which was patched in version 0.4.7. This issue in CVE-2024-28232 has been patched in version 0.4.8 but that version has not yet been uploaded to Go's package manager.
Severity
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-01 19:15 UTC
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
IceWhaleTech CasaOS-UserService Affected: = 0.4.7
Create a notification for this product.
icewhaletech casaos-userservice Affected: 0.4.7
    cpe:2.3:a:icewhaletech:casaos-userservice:0.4.7:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2024-25146 (GCVE-0-2024-25146)

Vulnerability from cvelistv5 – Published: 2024-02-08 03:36 – Updated: 2025-05-15 19:40
VLAI
Summary
Liferay Portal 7.2.0 through 7.4.1, and older unsupported versions, and Liferay DXP 7.3 before service pack 3, 7.2 before fix pack 18, and older unsupported versions returns with different responses depending on whether a site does not exist or if the user does not have permission to access the site, which allows remote attackers to discover the existence of sites by enumerating URLs. This vulnerability occurs if locale.prepend.friendly.url.style=2 and if a custom 404 page is used.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-08 15:42 UTC
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
Liferay Portal Affected: 7.2.0 , ≤ 7.4.1 (maven)
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Liferay DXP Affected: 7.3.10 , ≤ 7.3.10-dxp-2 (maven)
Affected: 7.2.10 , ≤ 7.2.10-dxp-17 (maven)
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CVE-2024-24766 (GCVE-0-2024-24766)

Vulnerability from cvelistv5 – Published: 2024-03-06 18:10 – Updated: 2024-08-01 23:28
VLAI
Title
CasaOS Username Enumeration
Summary
CasaOS-UserService provides user management functionalities to CasaOS. Starting in version 0.4.4.3 and prior to version 0.4.7, the Casa OS Login page disclosed the username enumeration vulnerability in the login page. An attacker can enumerate the CasaOS username using the application response. If the username is incorrect application gives the error `**User does not exist**`. If the password is incorrect application gives the error `**Invalid password**`. Version 0.4.7 fixes this issue.
Severity
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-19 16:24 UTC
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
IceWhaleTech CasaOS-UserService Affected: >= 0.4.4.3, < 0.4.7
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icewhaletech casaos-userservice Affected: 0.4.4.3 , < 0.4.7 (custom)
    cpe:2.3:a:icewhaletech:casaos-userservice:*:*:*:*:*:*:*:*
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CVE-2024-23574 (GCVE-0-2024-23574)

Vulnerability from cvelistv5 – Published: 2026-07-17 13:45 – Updated: 2026-07-17 15:20
VLAI
Summary
HCL Aftermarket EPC is vulnerable to attack since It was found that a malicious actor can use brute-force techniques to either guess or confirm valid users in the system. Use renumeration is when a malicious actor can use brute-force techniques to either guess or confirm valid users in a system
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 15:20 UTC
CWE
  • CWE-204 - Response Discrepancy Information Leakage
Assigner
References
Impacted products
Vendor Product Version
HCLSoftware Aftermarket EPC Affected: version 1.0.0
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CVE-2024-13198 (GCVE-0-2024-13198)

Vulnerability from cvelistv5 – Published: 2025-01-09 00:31 – Updated: 2025-01-09 15:37
VLAI
Title
langhsu Mblog Blog System login observable response discrepancy
Summary
A vulnerability classified as problematic has been found in langhsu Mblog Blog System 3.5.0. Affected is an unknown function of the file /login. The manipulation leads to observable response discrepancy. It is possible to launch the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
3.7 (Low)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-09 15:36 UTC
CWE
  • CWE-204 - Observable Response Discrepancy
  • CWE-203 - Information Exposure Through Discrepancy
Assigner
References
Impacted products
Credits
vastzero (VulDB User)
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CVE-2024-13028 (GCVE-0-2024-13028)

Vulnerability from cvelistv5 – Published: 2024-12-29 23:00 – Updated: 2024-12-30 14:43
VLAI
Title
Antabot White-Jotter login observable response discrepancy
Summary
A vulnerability, which was classified as problematic, has been found in Antabot White-Jotter up to 0.2.2. This issue affects some unknown processing of the file /login. The manipulation of the argument username leads to observable response discrepancy. The attack may be initiated remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
3.7 (Low)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-30 14:43 UTC
CWE
  • CWE-204 - Observable Response Discrepancy
  • CWE-203 - Information Exposure Through Discrepancy
Assigner
References
URL Tags
https://vuldb.com/?id.289721 vdb-entrytechnical-description
https://vuldb.com/?ctiid.289721 signaturepermissions-required
https://vuldb.com/?submit.465924 third-party-advisory
https://github.com/cydtseng/Vulnerability-Researc… exploit
Impacted products
Vendor Product Version
Antabot White-Jotter Affected: 0.2.0
Affected: 0.2.1
Affected: 0.2.2
Create a notification for this product.
Credits
vastzero (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2024-12663 (GCVE-0-2024-12663)

Vulnerability from cvelistv5 – Published: 2024-12-16 19:00 – Updated: 2024-12-16 19:19
VLAI
Title
funnyzpc Mee-Admin Login login observable response discrepancy
Summary
A vulnerability classified as problematic was found in funnyzpc Mee-Admin up to 1.6. This vulnerability affects unknown code of the file /mee/login of the component Login. The manipulation of the argument username leads to observable response discrepancy. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
3.7 (Low)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-16 19:19 UTC
CWE
  • CWE-204 - Observable Response Discrepancy
  • CWE-203 - Information Exposure Through Discrepancy
Assigner
References
URL Tags
https://vuldb.com/?id.288532 vdb-entrytechnical-description
https://vuldb.com/?ctiid.288532 signaturepermissions-required
https://vuldb.com/?submit.458371 third-party-advisory
https://github.com/funnyzpc/mee-admin/issues/9 exploitissue-tracking
Impacted products
Vendor Product Version
funnyzpc Mee-Admin Affected: 1.0
Affected: 1.1
Affected: 1.2
Affected: 1.3
Affected: 1.4
Affected: 1.5
Affected: 1.6
Create a notification for this product.
Credits
vastzero (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2024-8651 (GCVE-0-2024-8651)

Vulnerability from cvelistv5 – Published: 2024-09-19 16:30 – Updated: 2024-09-19 18:28
VLAI
Title
Netcat CMS: user enumeration
Summary
A vulnerability in NetCat CMS allows an attacker to send a specially crafted http request that can be used to check whether a user exists in the system, which could be a basis for further attacks. This issue affects NetCat CMS v. 6.4.0.24126.2 and possibly others. Apply patch from vendor https://netcat.ru/ https://netcat.ru/] . Versions 6.4.0.24248 and on have the patch.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-19 18:24 UTC
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
NetCat NetCat CMS Affected: 6.4.0.24126.2
Unaffected: 6.4.0.24248
Create a notification for this product.
netcat netcat Affected: 6.4.0.24126.2
    cpe:2.3:a:netcat:netcat:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
The vulnerability was discovered by Evgeny Velikoivanenko from Kaspersky (https://kaspersky.com)
Show details on NVD website
To clipboard 

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            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
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      "providerMetadata": {
        "dateUpdated": "2024-09-19T16:36:20.801Z",
        "orgId": "e45d732a-8f6b-4b6b-be76-7420f6a2b988",
        "shortName": "Kaspersky"
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      "references": [
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          "url": "https://github.com/klsecservices/Advisories/blob/master/K-NetCat-2024-001.md"
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      "source": {
        "discovery": "UNKNOWN"
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      "title": "Netcat CMS: user enumeration",
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    "assignerShortName": "Kaspersky",
    "cveId": "CVE-2024-8651",
    "datePublished": "2024-09-19T16:30:10.685Z",
    "dateReserved": "2024-09-10T12:27:44.134Z",
    "dateUpdated": "2024-09-19T18:28:53.419Z",
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Mitigation MIT-46
Architecture and Design

Strategy: Separation of Privilege

  • Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
Mitigation MIT-39
Implementation
  • Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed information to refine or optimize their original attack, thereby increasing their chances of success.
  • If errors must be captured in some detail, record them in log messages, but consider what could occur if the log messages can be viewed by attackers. Highly sensitive information such as passwords should never be saved to log files.
  • Avoid inconsistent messaging that might accidentally tip off an attacker about internal state, such as whether a user account exists or not.
CAPEC-331: ICMP IP Total Length Field Probe

An adversary sends a UDP packet to a closed port on the target machine to solicit an IP Header's total length field value within the echoed 'Port Unreachable" error message. This type of behavior is useful for building a signature-base of operating system responses, particularly when error messages contain other types of information that is useful identifying specific operating system responses.

CAPEC-332: ICMP IP 'ID' Field Error Message Probe

An adversary sends a UDP datagram having an assigned value to its internet identification field (ID) to a closed port on a target to observe the manner in which this bit is echoed back in the ICMP error message. This allows the attacker to construct a fingerprint of specific OS behaviors.

CAPEC-541: Application Fingerprinting

An adversary engages in fingerprinting activities to determine the type or version of an application installed on a remote target.

CAPEC-580: System Footprinting

An adversary engages in active probing and exploration activities to determine security information about a remote target system. Often times adversaries will rely on remote applications that can be probed for system configurations.

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