CWE-203
Observable Discrepancy
Description
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
Hierarchy (View 1000)
Related attack patterns (CAPEC)
CAPEC-189
CVEs mapped to this weakness (762)
page 30 of 39| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2024-30257 | Low | 0.25 | 3.9 | 0.00 | Apr 18, 2024 | 1Panel is an open source Linux server operation and maintenance management panel. The password verification in the source code uses the != symbol instead hmac.Equal. This may lead to a timing attack vulnerability. This vulnerability is fixed in 1.10.3-lts. | ||
| CVE-2020-25082 | Low | 0.25 | 3.8 | 0.00 | Aug 10, 2021 | An attacker with physical access to Nuvoton Trusted Platform Module (NPCT75x 7.2.x before 7.2.2.0) could extract an Elliptic Curve Cryptography (ECC) private key via a side-channel attack against ECDSA, because of an Observable Timing Discrepancy. | ||
| CVE-2025-13736 | — | Low | 0.24 | 3.7 | 0.00 | Aug 6, 2026 | When Multi-Attribute Login is enabled, the login interface fails to consistently mask the existence of user accounts. For valid users, the server resolves and displays their canonical username, while for non-existent users, it echoes the original input. This occurs regardless of… | |
| CVE-2026-8242 | Low | 0.24 | 3.7 | 0.00 | May 10, 2026 | A vulnerability was found in Industrial Application Software IAS Canias ERP 8.03. The impacted element is the function doAction of the component Login RMI Interface. Performing a manipulation results in observable response discrepancy. The attack is possible to be carried out… | ||
| CVE-2025-67806 | Low | 0.24 | 3.7 | 0.00 | Apr 1, 2026 | The login mechanism of Sage DPW 2021_06_004 displays distinct responses for valid and invalid usernames, allowing enumeration of existing accounts in versions before 2021_06_000. On-premise administrators can toggle this behavior in newer versions. | ||
| CVE-2026-3580 | Med | 0.24 | 4.7 | 0.00 | Mar 19, 2026 | In wolfSSL 5.8.4, constant-time masking logic in sp_256_get_entry_256_9 is optimized into conditional branches (bnez) by GCC when targeting RISC-V RV32I with -O3. This transformation breaks the side-channel resistance of ECC scalar multiplication, potentially allowing a local… | ||
| CVE-2026-4045 | Low | 0.24 | 3.7 | 0.00 | Mar 12, 2026 | A flaw has been found in projectsend up to r1945. This impacts an unknown function of the file includes/Classes/Auth.php. Executing a manipulation of the argument ldap_email can lead to observable response discrepancy. The attack can be executed remotely. A high complexity level… | ||
| CVE-2025-11443 | Low | 0.24 | 3.7 | 0.01 | Oct 8, 2025 | A weakness has been identified in JhumanJ OpnForm up to 1.9.3. This affects an unknown function of the file /api/password/email of the component Forgotten Password Handler. This manipulation causes information exposure through discrepancy. It is possible to initiate the attack… | ||
| CVE-2025-9109 | Low | 0.24 | 3.7 | 0.00 | Aug 18, 2025 | A security flaw has been discovered in Portabilis i-Diario up to 1.5.0. Affected by this vulnerability is an unknown functionality of the file /password/email of the component Password Recovery Endpoint. The manipulation results in observable response discrepancy. It is possible… | ||
| CVE-2025-6011 | Low | 0.24 | 3.7 | 0.00 | Aug 1, 2025 | A timing side channel in Vault and Vault Enterprise’s (“Vault”) userpass auth method allowed an attacker to distinguish between existing and non-existing users, and potentially enumerate valid usernames for Vault’s Userpass auth method. Fixed in Vault Community Edition… | ||
| CVE-2024-41760 | Low | 0.24 | 3.7 | 0.00 | Mar 11, 2025 | IBM Common Cryptographic Architecture 7.0.0 through 7.5.51 could allow an attacker to obtain sensitive information due to a timing attack during certain RSA operations. | ||
| CVE-2025-24023 | Low | 0.24 | 3.7 | 0.00 | Mar 3, 2025 | 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. | ||
| CVE-2024-42174 | Low | 0.24 | 3.7 | 0.00 | Jan 11, 2025 | HCL MyXalytics is affected by username enumeration vulnerability. This allows a malicious user to perform enumeration of application users, and therefore compile a list of valid usernames. | ||
| CVE-2024-13198 | Low | 0.24 | 3.7 | 0.01 | Jan 9, 2025 | 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… | ||
| CVE-2024-13028 | Low | 0.24 | 3.7 | 0.01 | Dec 29, 2024 | 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… | ||
| CVE-2024-12663 | Low | 0.24 | 3.7 | 0.00 | Dec 16, 2024 | 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… | ||
| CVE-2024-21210 | Low | 0.24 | 3.7 | 0.01 | Oct 15, 2024 | Vulnerability in Oracle Java SE (component: Hotspot). Supported versions that are affected are Oracle Java SE: 8u421, 8u421-perf, 11.0.24, 17.0.12, 21.0.4 and 23. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to… | ||
| CVE-2024-21208 | Low | 0.24 | 3.7 | 0.01 | Oct 15, 2024 | Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 8u421, 8u421-perf, 11.0.24, 17.0.12, 21.0.4, 23; Oracle GraalVM for JDK:… | ||
| CVE-2024-47869 | Low | 0.24 | 3.7 | 0.00 | Oct 10, 2024 | Gradio is an open-source Python package designed for quick prototyping. This vulnerability involves a **timing attack** in the way Gradio compares hashes for the `analytics_dashboard` function. Since the comparison is not done in constant time, an attacker could exploit this by… | ||
| CVE-2023-36325 | — | Low | 0.24 | 3.7 | 0.01 | Oct 9, 2024 | i2p before 2.3.0 (Java) allows de-anonymizing the public IPv4 and IPv6 addresses of i2p hidden services (aka eepsites) via a correlation attack across the IPv4 and IPv6 addresses that occurs when a tunneled, replayed message has a behavior discrepancy (it may be dropped, or may… |
- risk 0.25cvss 3.9epss 0.00
1Panel is an open source Linux server operation and maintenance management panel. The password verification in the source code uses the != symbol instead hmac.Equal. This may lead to a timing attack vulnerability. This vulnerability is fixed in 1.10.3-lts.
- risk 0.25cvss 3.8epss 0.00
An attacker with physical access to Nuvoton Trusted Platform Module (NPCT75x 7.2.x before 7.2.2.0) could extract an Elliptic Curve Cryptography (ECC) private key via a side-channel attack against ECDSA, because of an Observable Timing Discrepancy.
- risk 0.24cvss 3.7epss 0.00
When Multi-Attribute Login is enabled, the login interface fails to consistently mask the existence of user accounts. For valid users, the server resolves and displays their canonical username, while for non-existent users, it echoes the original input. This occurs regardless of…
- risk 0.24cvss 3.7epss 0.00
A vulnerability was found in Industrial Application Software IAS Canias ERP 8.03. The impacted element is the function doAction of the component Login RMI Interface. Performing a manipulation results in observable response discrepancy. The attack is possible to be carried out…
- risk 0.24cvss 3.7epss 0.00
The login mechanism of Sage DPW 2021_06_004 displays distinct responses for valid and invalid usernames, allowing enumeration of existing accounts in versions before 2021_06_000. On-premise administrators can toggle this behavior in newer versions.
- risk 0.24cvss 4.7epss 0.00
In wolfSSL 5.8.4, constant-time masking logic in sp_256_get_entry_256_9 is optimized into conditional branches (bnez) by GCC when targeting RISC-V RV32I with -O3. This transformation breaks the side-channel resistance of ECC scalar multiplication, potentially allowing a local…
- risk 0.24cvss 3.7epss 0.00
A flaw has been found in projectsend up to r1945. This impacts an unknown function of the file includes/Classes/Auth.php. Executing a manipulation of the argument ldap_email can lead to observable response discrepancy. The attack can be executed remotely. A high complexity level…
- risk 0.24cvss 3.7epss 0.01
A weakness has been identified in JhumanJ OpnForm up to 1.9.3. This affects an unknown function of the file /api/password/email of the component Forgotten Password Handler. This manipulation causes information exposure through discrepancy. It is possible to initiate the attack…
- risk 0.24cvss 3.7epss 0.00
A security flaw has been discovered in Portabilis i-Diario up to 1.5.0. Affected by this vulnerability is an unknown functionality of the file /password/email of the component Password Recovery Endpoint. The manipulation results in observable response discrepancy. It is possible…
- risk 0.24cvss 3.7epss 0.00
A timing side channel in Vault and Vault Enterprise’s (“Vault”) userpass auth method allowed an attacker to distinguish between existing and non-existing users, and potentially enumerate valid usernames for Vault’s Userpass auth method. Fixed in Vault Community Edition…
- risk 0.24cvss 3.7epss 0.00
IBM Common Cryptographic Architecture 7.0.0 through 7.5.51 could allow an attacker to obtain sensitive information due to a timing attack during certain RSA operations.
- risk 0.24cvss 3.7epss 0.00
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.
- risk 0.24cvss 3.7epss 0.00
HCL MyXalytics is affected by username enumeration vulnerability. This allows a malicious user to perform enumeration of application users, and therefore compile a list of valid usernames.
- risk 0.24cvss 3.7epss 0.01
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…
- risk 0.24cvss 3.7epss 0.01
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…
- risk 0.24cvss 3.7epss 0.00
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…
- risk 0.24cvss 3.7epss 0.01
Vulnerability in Oracle Java SE (component: Hotspot). Supported versions that are affected are Oracle Java SE: 8u421, 8u421-perf, 11.0.24, 17.0.12, 21.0.4 and 23. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to…
- risk 0.24cvss 3.7epss 0.01
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 8u421, 8u421-perf, 11.0.24, 17.0.12, 21.0.4, 23; Oracle GraalVM for JDK:…
- risk 0.24cvss 3.7epss 0.00
Gradio is an open-source Python package designed for quick prototyping. This vulnerability involves a **timing attack** in the way Gradio compares hashes for the `analytics_dashboard` function. Since the comparison is not done in constant time, an attacker could exploit this by…
- risk 0.24cvss 3.7epss 0.01
i2p before 2.3.0 (Java) allows de-anonymizing the public IPv4 and IPv6 addresses of i2p hidden services (aka eepsites) via a correlation attack across the IPv4 and IPv6 addresses that occurs when a tunneled, replayed message has a behavior discrepancy (it may be dropped, or may…