Common Weakness Enumeration
CWE-208
AllowedObservable Timing Discrepancy
Abstraction: Base · Status: Incomplete
Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
356 vulnerabilities reference this CWE, most recent first.
CVE-2025-13473 (GCVE-0-2025-13473)
Vulnerability from cvelistv5 – Published: 2026-02-03 14:32 – Updated: 2026-02-03 16:19
VLAI
EPSS
VEX
Title
Username enumeration through timing difference in mod_wsgi authentication handler
Summary
An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28.
The `django.contrib.auth.handlers.modwsgi.check_password()` function for authentication via `mod_wsgi` allows remote attackers to enumerate users via a timing attack.
Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.
Django would like to thank Stackered for reporting this issue.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-03 16:19 UTC
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://docs.djangoproject.com/en/dev/releases/se… | vendor-advisory |
| https://groups.google.com/g/django-announce | mailing-list |
| https://www.djangoproject.com/weblog/2026/feb/03/… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| djangoproject | Django |
Affected:
6.0 , < 6.0.2
(semver)
Unaffected: 6.0.2 (semver) Affected: 5.2 , < 5.2.11 (semver) Unaffected: 5.2.11 (semver) Affected: 4.2 , < 4.2.28 (semver) Unaffected: 4.2.28 (semver) |
Date Public
2026-02-03 08:00
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CVE-2025-9031 (GCVE-0-2025-9031)
Vulnerability from cvelistv5 – Published: 2025-09-24 08:25 – Updated: 2026-06-05 11:15
VLAI
EPSS
VEX
Title
Timing-Based Username Enumeration in DivvyDrive Information Technologies' DivvyDrive Web
Summary
Observable Timing Discrepancy vulnerability in DivvyDrive Information Technologies Inc. DivvyDrive Web allows Cross-Domain Search Timing.
This issue affects DivvyDrive Web: from 4.8.2.2 before 4.8.2.15.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-24 14:03 UTC
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.usom.gov.tr/bildirim/tr-25-0293 | government-resourcebroken-link |
| https://siberguvenlik.gov.tr/guvenlik-bildirimler… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| DivvyDrive Information Technologies Inc. | DivvyDrive Web |
Affected:
4.8.2.2 , < 4.8.2.15
(custom)
|
Date Public
2025-09-24 08:23
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CVE-2025-8774 (GCVE-0-2025-8774)
Vulnerability from cvelistv5 – Published: 2025-08-09 20:32 – Updated: 2025-08-12 16:04
VLAI
EPSS
VEX
Title
riscv-boom SonicBOOM L1 Data Cache timing discrepancy
Summary
A vulnerability has been found in riscv-boom SonicBOOM up to 2.2.3 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component L1 Data Cache Handler. The manipulation leads to observable timing discrepancy. Local access is required to approach this attack. The complexity of an attack is rather high. The exploitation appears to be difficult. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-12 15:47 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.319297 | vdb-entry |
| https://vuldb.com/?ctiid.319297 | signaturepermissions-required |
| https://vuldb.com/?submit.625550 | third-party-advisory |
| https://github.com/fizz-is-on-the-way/vuls_cpu/tr… | related |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| riscv-boom | SonicBOOM |
Affected:
2.2.0
Affected: 2.2.1 Affected: 2.2.2 Affected: 2.2.3 |
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CVE-2025-7383 (GCVE-0-2025-7383)
Vulnerability from cvelistv5 – Published: 2025-08-29 09:19 – Updated: 2025-08-29 13:46
VLAI
EPSS
VEX
Title
Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in Oberon PSA Crypto library
Summary
Padding oracle attack vulnerability in Oberon microsystem AG’s Oberon PSA Crypto library in all versions since 1.0.0 and prior to 1.5.1 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-29 13:46 UTC
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Oberon microsystems AG | Oberon PSA Crypto |
Affected:
1.0.0 , ≤ 1.5.0
(custom)
|
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CVE-2025-7071 (GCVE-0-2025-7071)
Vulnerability from cvelistv5 – Published: 2025-08-29 09:18 – Updated: 2025-08-29 12:07
VLAI
EPSS
VEX
Title
Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in ocrypto library
Summary
Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-29 12:07 UTC
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Oberon microsystems AG | ocrypto |
Affected:
3.1.0 , ≤ 3.9.1
(custom)
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CVE-2025-0693 (GCVE-0-2025-0693)
Vulnerability from cvelistv5 – Published: 2025-01-23 21:22 – Updated: 2025-10-14 18:42 Exclusively Hosted Service
VLAI
EPSS
VEX
Title
Issue with AWS Sign-in IAM User Login Flow - Possible Username Enumeration
Summary
Variable response times in the AWS Sign-in IAM user login flow allowed for the use of brute force enumeration techniques to identify valid IAM usernames in an arbitrary AWS account.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-24 19:45 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | AWS Sign-in IAM Login Flow |
Affected:
N/A
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CVE-2024-56738 (GCVE-0-2024-56738)
Vulnerability from cvelistv5 – Published: 2024-12-29 00:00 – Updated: 2024-12-31 18:15
VLAI
EPSS
VEX
Summary
GNU GRUB (aka GRUB2) through 2.12 does not use a constant-time algorithm for grub_crypto_memcmp and thus allows side-channel attacks.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-31 18:14 UTC
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://savannah.gnu.org/bugs/?66603 |
Impacted products
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CVE-2024-52307 (GCVE-0-2024-52307)
Vulnerability from cvelistv5 – Published: 2024-11-21 17:14 – Updated: 2024-11-27 16:03
VLAI
EPSS
VEX
Title
authentik allows a timing attack due to missing constant time comparison for metrics view
Summary
authentik is an open-source identity provider. Due to the usage of a non-constant time comparison for the /-/metrics/ endpoint it was possible to brute-force the SECRET_KEY, which is used to authenticate the endpoint. The /-/metrics/ endpoint returns Prometheus metrics and is not intended to be accessed directly, as the Go proxy running in the authentik server container fetches data from this endpoint and serves it on a separate port (9300 by default), which can be scraped by Prometheus without being exposed publicly. authentik 2024.8.5 and 2024.10.3 fix this issue. Since the /-/metrics/ endpoint is not intended to be accessed publicly, requests to the endpoint can be blocked by the reverse proxy/load balancer used in conjunction with authentik.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-21 21:05 UTC
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/goauthentik/authentik/security… | x_refsource_CONFIRM |
| https://github.com/goauthentik/authentik/commit/5… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2024/11/27/1 |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| goauthentik | authentik |
Affected:
< 2024.8.5
Affected: >= 2024.10.0-rc1, < 2024.10.3 |
|
| goauthentik | authentik |
Affected:
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(custom)
Affected: 2024.10.0-rc1 , < 2024.10.3 (custom) cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* |
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CVE-2024-47178 (GCVE-0-2024-47178)
Vulnerability from cvelistv5 – Published: 2024-09-30 15:09 – Updated: 2024-09-30 16:01
VLAI
EPSS
VEX
Title
basic-auth-connect's callback uses time unsafe string comparison
Summary
basic-auth-connect is Connect's Basic Auth middleware in its own module. basic-auth-connect < 1.1.0 uses a timing-unsafe equality comparison that can leak timing information. This issue has been fixed in basic-auth-connect 1.1.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-30 16:01 UTC
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/expressjs/basic-auth-connect/s… | x_refsource_CONFIRM |
| https://github.com/expressjs/basic-auth-connect/c… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| expressjs | basic-auth-connect |
Affected:
< 1.1.0
|
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CVE-2024-45052 (GCVE-0-2024-45052)
Vulnerability from cvelistv5 – Published: 2024-09-04 15:43 – Updated: 2024-09-04 16:19
VLAI
EPSS
VEX
Title
Fides Webserver Authentication Timing-Based Username Enumeration Vulnerability
Summary
Fides is an open-source privacy engineering platform. Prior to version 2.44.0, a timing-based username enumeration vulnerability exists in Fides Webserver authentication. This vulnerability allows an unauthenticated attacker to determine the existence of valid usernames by analyzing the time it takes for the server to respond to login requests. The discrepancy in response times between valid and invalid usernames can be leveraged to enumerate users on the system. This vulnerability enables a timing-based username enumeration attack. An attacker can systematically guess and verify which usernames are valid by measuring the server's response time to authentication requests. This information can be used to conduct further attacks on authentication such as password brute-forcing and credential stuffing. The vulnerability has been patched in Fides version `2.44.0`. Users are advised to upgrade to this version or later to secure their systems against this threat. There are no workarounds.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-04 16:19 UTC
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/ethyca/fides/security/advisori… | x_refsource_CONFIRM |
| https://github.com/ethyca/fides/commit/457b0e9df9… | x_refsource_MISC |
Impacted products
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No mitigation information available for this CWE.
CAPEC-462: Cross-Domain Search Timing
An attacker initiates cross domain HTTP / GET requests and times the server responses. The timing of these responses may leak important information on what is happening on the server. Browser's same origin policy prevents the attacker from directly reading the server responses (in the absence of any other weaknesses), but does not prevent the attacker from timing the responses to requests that the attacker issued cross domain.
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.