CWE-204

Observable Response Discrepancy

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.

CVE-2025-1101 (GCVE-0-2025-1101)

Vulnerability from cvelistv5 – Published: 2025-02-12 13:26 – Updated: 2025-02-17 10:07
VLAI
Summary
A CWE-204 "Observable Response Discrepancy" in the login page in Q-Free MaxTime less than or equal to version 2.11.0 allows an unauthenticated remote attacker to enumerate valid usernames via crafted HTTP requests.
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
Impacted products
Vendor Product Version
Q-Free MaxTime Affected: 0 , ≤ 2.11.0 (semver)
Create a notification for this product.
Credits
Andrea Palanca of Nozomi Networks found this bug during a security research activity. Q-Free
Show details on NVD website

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CVE-2025-12455 (GCVE-0-2025-12455)

Vulnerability from cvelistv5 – Published: 2026-03-13 18:30 – Updated: 2026-03-13 19:33
VLAI
Title
Username Enumeration Observable Response Discrepancy vulnerability has been discovered in OpenText™ Vertica.
Summary
Observable response discrepancy vulnerability in OpenText™ Vertica allows Password Brute Forcing.   The vulnerability could lead to Password Brute Forcing in Vertica management console application.This issue affects Vertica: from 10.0 through 10.X, from 11.0 through 11.X, from 12.0 through 12.X.
CWE
  • CWE-204 - Observable response discrepancy
Assigner
Impacted products
Vendor Product Version
OpenText™ Vertica Affected: 10.0 , ≤ 10.x (custom)
Affected: 11.0 , ≤ 11.x (custom)
Affected: 12.0 , ≤ 12.x (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2025-12994 (GCVE-0-2025-12994)

Vulnerability from cvelistv5 – Published: 2025-12-04 20:02 – Updated: 2025-12-08 21:02
VLAI
Summary
Medtronic CareLink Network allows an unauthenticated remote attacker to initiate a request for security questions to an API endpoint that could be used to determine a valid user account. This issue affects CareLink Network: before December 4, 2025.
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
Medtronic CareLink Network Affected: 0 , < December 4, 2025 (custom)
Create a notification for this product.
Credits
Bernhard Lorenz
Show details on NVD website

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CVE-2025-13460 (GCVE-0-2025-13460)

Vulnerability from cvelistv5 – Published: 2026-03-13 19:54 – Updated: 2026-03-16 13:50
VLAI
Title
IBM Aspera Console Information Disclosure
Summary
IBM Aspera Console 3.3.0 through 3.4.8 could allow an attacker to enumerate usernames due to an observable response discrepancy.
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
ibm
References
URL Tags
https://www.ibm.com/support/pages/node/7263486 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Aspera Console Affected: 3.3.0 , ≤ 3.4.8 (semver)
    cpe:2.3:a:ibm:aspera_console:3.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:aspera_console:3.4.8:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2025-23193 (GCVE-0-2025-23193)

Vulnerability from cvelistv5 – Published: 2025-02-11 00:35 – Updated: 2025-02-11 16:00
VLAI
Title
Information Disclosure vulnerability in SAP NetWeaver Application Server ABAP
Summary
SAP NetWeaver Server ABAP allows an unauthenticated attacker to exploit a vulnerability that causes the server to respond differently based on the existence of a specified user, potentially revealing sensitive information. This issue does not enable data modification and has no impact on server availability.
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
sap
Impacted products
Vendor Product Version
SAP_SE SAP NetWeaver Server ABAP Affected: SAP_BASIS 700
Affected: SAP_BASIS 701
Affected: SAP_BASIS 702
Affected: SAP_BASIS 731
Affected: SAP_BASIS 740
Affected: SAP_BASIS 750
Affected: SAP_BASIS 751
Affected: SAP_BASIS 752
Affected: SAP_BASIS 753
Affected: SAP_BASIS 754
Affected: SAP_BASIS 755
Affected: SAP_BASIS 756
Affected: SAP_BASIS 757
Affected: SAP_BASIS 758
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CVE-2025-23214 (GCVE-0-2025-23214)

Vulnerability from cvelistv5 – Published: 2025-01-20 18:09 – Updated: 2025-02-12 20:41
VLAI
Title
Cosmos userbase checking vulnerability
Summary
Cosmos provides users the ability self-host a home server by acting as a secure gateway to your application, as well as a server manager. By monitoring the error code returned in the login, it is possible to figure out whether a user exist or not in the database. Patched in 0.17.7.
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
azukaar Cosmos-Server Affected: < 0.17.7
Create a notification for this product.
Show details on NVD website

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CVE-2025-24023 (GCVE-0-2025-24023)

Vulnerability from cvelistv5 – Published: 2025-03-03 15:25 – Updated: 2025-03-03 18:41
VLAI
Title
Observable Response Discrepancy in flask-appbuilder
Summary
Flask-AppBuilder is an application development framework. Prior to 4.5.3, Flask-AppBuilder allows unauthenticated users to enumerate existing usernames by timing the response time from the server when brute forcing requests to login. This vulnerability is fixed in 4.5.3.
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Show details on NVD website

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CVE-2025-24980 (GCVE-0-2025-24980)

Vulnerability from cvelistv5 – Published: 2025-02-07 19:56 – Updated: 2026-01-16 17:17
VLAI
Title
Pimcore Admin Classic Bundle allows user enumeration
Summary
pimcore/admin-ui-classic-bundle provides a Backend UI for Pimcore. In affected versions an error message discloses existing accounts and leads to user enumeration on the target via "Forgot password" function. No generic error message has been implemented. This issue has been addressed in version 1.7.4 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
Impacted products
Show details on NVD website

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CVE-2025-25236 (GCVE-0-2025-25236)

Vulnerability from cvelistv5 – Published: 2025-11-12 17:41 – Updated: 2025-11-12 21:04
VLAI
Summary
Omnissa Workspace ONE UEM contains an observable response discrepancy vulnerability. A malicious actor may be able to enumerate sensitive information such as tenant ID and user accounts that could facilitate brute-force, password-spraying or credential-stuffing attacks.
CWE
  • CWE-204 - Observable Discrepancy Response
Assigner
Impacted products
Vendor Product Version
Omnissa Omnissa Workspace ONE UEM Affected: Omnissa Workspace ONE UEM version prior to 24.10.0.25
Affected: Omnissa Workspace ONE UEM version prior to 24.6.0.44
Affected: Omnissa Workspace ONE UEM version prior to 24.2.0.36
Create a notification for this product.
Show details on NVD website

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CVE-2025-27451 (GCVE-0-2025-27451)

Vulnerability from cvelistv5 – Published: 2025-07-03 11:27 – Updated: 2025-07-03 13:16
VLAI
Title
CVE-2025-27451
Summary
For failed login attempts, the application returns different error messages depending on whether the login failed due to an incorrect password or a non-existing username. This allows an attacker to guess usernames until they find an existing one.
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
URL Tags
https://www.endress.com x_Endress+Hauser
https://sick.com/psirt x_SICK PSIRT Security Advisories
https://www.cisa.gov/resources-tools/resources/ic… x_ICS-CERT recommended practices on Industrial Security
https://www.first.org/cvss/calculator/3.1 x_CVSS v3.1 Calculator
https://www.sick.com/.well-known/csaf/white/2025/… x_The canonical URL.
https://sick.com/psirt vendor-advisory
https://www.sick.com/.well-known/csaf/white/2025/… vendor-advisory
Impacted products
Show details on NVD website

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Mitigation ID: MIT-46

Phase: Architecture and Design

Strategy: Separation of Privilege

Description:

  • 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 ID: MIT-39

Phase: Implementation

Description:

  • 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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