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CWE-203

751 CVEs • Abstraction: Base

Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

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CVEs (751)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Qsan
1Storage Manager
Jun 17, 2026
Jul 7, 2021
N/A· v4
5.3 MEDIUM· v3
5.0 MEDIUM· v2
Observable behavioral discrepancy vulnerability in QSAN Storage Manager allows remote attackers to obtain the system information without permissions. Suggest contacting with QSAN and refer to recommendations in QSAN Docu...Show more
Observable behavioral discrepancy vulnerability in QSAN Storage Manager allows remote attackers to obtain the system information without permissions. Suggest contacting with QSAN and refer to recommendations in QSAN Document.Show less
3Debian
FedoraprojectIntel
7Celeron Processors Firmware
Core Processors FirmwareDebian Linux+4 more
Jun 17, 2026
Jun 9, 2021
N/A· v4
6.5 MEDIUM· v3
2.1 LOW· v2
Observable response discrepancy in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access.
2Fedoraproject
Intel
7Brand Verification Tool
Celeron Processors FirmwareCore Processors Firmware+4 more
Jun 17, 2026
Jun 9, 2021
N/A· v4
6.5 MEDIUM· v3
2.1 LOW· v2
Observable response discrepancy in floating-point operations for some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access.
1Intel
4Integrated Performance Primitives Cryptography
Sgx DcapSgx Psw+1 more
Jun 17, 2026
Jun 9, 2021
N/A· v4
4.7 MEDIUM· v3
2.1 LOW· v2
Observable timing discrepancy in Intel(R) IPP before version 2020 update 1 may allow authorized user to potentially enable information disclosure via local access.
3Debian
IntelNetapp
5Debian Linux
Fas/aff BiosHci Compute Node Bios+2 more
Jun 17, 2026
Jun 9, 2021
N/A· v4
3.3 LOW· v3
2.1 LOW· v2
Observable timing discrepancy in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.
5Arm
BroadcomFedoraproject+2 more
8Bcm2711
Core I7 10700kCore I7 7700k+5 more
Jun 17, 2026
Jun 9, 2021
N/A· v4
5.5 MEDIUM· v3
2.1 LOW· v2
Potential floating point value injection in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution with incorrect floating point results, may cause the use of incorrect...Show more
Potential floating point value injection in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution with incorrect floating point results, may cause the use of incorrect data from FPVI and may result in data leakage.Show less
5Arm
BroadcomDebian+2 more
8Bcm2711
Core I7 10700kCore I7 7700k+5 more
Jun 17, 2026
Jun 9, 2021
N/A· v4
5.5 MEDIUM· v3
2.1 LOW· v2
Potential speculative code store bypass in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution of overwritten instructions, may cause an incorrect speculation and co...Show more
Potential speculative code store bypass in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution of overwritten instructions, may cause an incorrect speculation and could result in data leakage.Show less
4Debian
FedoraprojectGnupg+1 more
8Communications Cloud Native Core Binding Support Function
Communications Cloud Native Core Network Function Cloud Native EnvironmentCommunications Cloud Native Core Network Repository Function+5 more
Jun 17, 2026
Jun 8, 2021
N/A· v4
7.5 HIGH· v3
5.0 MEDIUM· v2
Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for...Show more
Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.Show less
2Apache
Dpgaspar
2Airflow
Flask Appbuilder
Jun 17, 2026
Jun 7, 2021
N/A· v4
5.3 MEDIUM· v3
5.0 MEDIUM· v2
Flask-AppBuilder is a development framework, built on top of Flask. User enumeration in database authentication in Flask-AppBuilder <= 3.2.3. Allows for a non authenticated user to enumerate existing accounts by timing t...Show more
Flask-AppBuilder is a development framework, built on top of Flask. User enumeration in database authentication in Flask-AppBuilder <= 3.2.3. Allows for a non authenticated user to enumerate existing accounts by timing the response time from the server when you are logging in. Upgrade to version 3.3.0 or higher to resolve.Show less
2Oracle
Websockets Project
5Communications Cloud Native Core Policy
Communications Cloud Native Core Security Edge Protection ProxyCommunications Cloud Native Core Service Communication Proxy+2 more
Jun 17, 2026
Jun 6, 2021
N/A· v4
5.9 MEDIUM· v3
2.6 LOW· v2
The aaugustin websockets library before 9.1 for Python has an Observable Timing Discrepancy on servers when HTTP Basic Authentication is enabled with basic_auth_protocol_factory(credentials=...). An attacker may be able...Show more
The aaugustin websockets library before 9.1 for Python has an Observable Timing Discrepancy on servers when HTTP Basic Authentication is enabled with basic_auth_protocol_factory(credentials=...). An attacker may be able to guess a password via a timing attack.Show less
1Luca App
1Luca
Jun 17, 2026
Jun 4, 2021
N/A· v4
7.5 HIGH· v3
5.0 MEDIUM· v2
Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID-19 tracking because requests related to Check-In State occur shortly after requests for Phone Number Registration.
1Rocketchat
1Rocket.chat
Jun 17, 2026
May 27, 2021
N/A· v4
7.5 HIGH· v3
5.0 MEDIUM· v2
An information disclosure vulnerability exists in the Rocket.Chat server fixed v3.13, v3.12.2 & v3.11.3 that allowed email addresses to be disclosed by enumeration and validation checks.
1Nordicsemi
1Nrf52840 Firmware
Jun 17, 2026
May 21, 2021
N/A· v4
5.7 MEDIUM· v3
3.3 LOW· v2
Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels. The flash read-out protection (APPROTECT) can be bypassed by injecting a fault during the boot phase.
1Nordicsemi
1Nrf52840 Firmware
Jun 17, 2026
May 21, 2021
N/A· v4
5.5 MEDIUM· v3
2.1 LOW· v2
The elliptic curve cryptography (ECC) hardware accelerator, part of the ARM® TrustZone® CryptoCell 310, contained in the NordicSemiconductor nRF52840 through 2021-03-29 has a non-constant time ECDSA implemenation. This a...Show more
The elliptic curve cryptography (ECC) hardware accelerator, part of the ARM® TrustZone® CryptoCell 310, contained in the NordicSemiconductor nRF52840 through 2021-03-29 has a non-constant time ECDSA implemenation. This allows an adversary to recover the private ECC key used during an ECDSA operation.Show less
1Ibm
1Security Identity Manager
Jun 17, 2026
May 20, 2021
N/A· v4
5.3 MEDIUM· v3
5.0 MEDIUM· v2
IBM Security Identity Manager 7.0.2 could allow a remote user to enumerate usernames due to a difference of responses from valid and invalid login attempts. IBM X-Force ID: 200018
1Dlink
1Dir 842e Firmware
Jun 17, 2026
May 17, 2021
N/A· v4
5.9 MEDIUM· v3
4.3 MEDIUM· v2
An authentication brute-force protection mechanism bypass in telnetd in D-Link Router model DIR-842 firmware version 3.0.2 allows a remote attacker to circumvent the anti-brute-force cool-down delay period via a timing-b...Show more
An authentication brute-force protection mechanism bypass in telnetd in D-Link Router model DIR-842 firmware version 3.0.2 allows a remote attacker to circumvent the anti-brute-force cool-down delay period via a timing-based side-channel attackShow less
2Fedoraproject
Sensiolabs
2Fedora
Symfony
Jun 17, 2026
May 13, 2021
N/A· v4
5.3 MEDIUM· v3
5.0 MEDIUM· v2
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The ability to enumerate users was possible without relevant permissions due to different handling depending on whether th...Show more
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The ability to enumerate users was possible without relevant permissions due to different handling depending on whether the user existed or not when attempting to use the switch users functionality. We now ensure that 403s are returned whether the user exists or not if a user cannot switch to a user or if the user does not exist. The patch for this issue is available for branch 3.4.Show less
1Cisco
2Catalyst Sd Wan Manager
Sd Wan Vmanage
Jun 17, 2026
May 6, 2021
N/A· v4
5.3 MEDIUM· v3
5.0 MEDIUM· v2
A vulnerability in Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to enumerate user accounts. This vulnerability is due to the improper handling of HTTP headers. An attacker could exploit t...Show more
A vulnerability in Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to enumerate user accounts. This vulnerability is due to the improper handling of HTTP headers. An attacker could exploit this vulnerability by sending authenticated requests to an affected system. A successful exploit could allow the attacker to compare the HTTP responses that are returned by the affected system to determine which accounts are valid user accounts.Show less
2Debian
Redmine
2Debian Linux
Redmine
Jun 17, 2026
Apr 28, 2021
N/A· v4
5.3 MEDIUM· v3
5.0 MEDIUM· v2
Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerContr...Show more
Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.Show less
1Vaadin
2Flow
Vaadin
Jun 17, 2026
Apr 23, 2021
N/A· v4
2.5 LOW· v3
1.9 LOW· v2
Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0)...Show more
Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack.Show less