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.
306 vulnerabilities reference this CWE, most recent first.
CVE-2025-46570 (GCVE-0-2025-46570)
Vulnerability from cvelistv5 – Published: 2025-05-29 16:32 – Updated: 2025-05-29 18:05
VLAI
EPSS
VEX
Title
vLLM’s Chunk-Based Prefix Caching Vulnerable to Potential Timing Side-Channel
Summary
vLLM is an inference and serving engine for large language models (LLMs). Prior to version 0.9.0, when a new prompt is processed, if the PageAttention mechanism finds a matching prefix chunk, the prefill process speeds up, which is reflected in the TTFT (Time to First Token). These timing differences caused by matching chunks are significant enough to be recognized and exploited. This issue has been patched in version 0.9.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/vllm-project/vllm/security/adv… | x_refsource_CONFIRM |
| https://github.com/vllm-project/vllm/pull/17045 | x_refsource_MISC |
| https://github.com/vllm-project/vllm/commit/77073… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| vllm-project | vllm |
Affected:
< 0.9.0
|
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CVE-2025-43754 (GCVE-0-2025-43754)
Vulnerability from cvelistv5 – Published: 2025-08-21 17:10 – Updated: 2025-08-21 20:01
VLAI
EPSS
VEX
Summary
Username enumeration vulnerability in Liferay Portal 7.4.0 through 7.4.3.132, and Liferay DXP 2024.Q4.0 through 2024.Q4.7, 2024.Q3.0 through 2024.Q3.13, 2024.Q2.0 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.14 and 7.4 GA through update 92 allows attackers to determine if an account exist in the application by inspecting the server processing time of the login request.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
Impacted products
2 products
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CVE-2025-30344 (GCVE-0-2025-30344)
Vulnerability from cvelistv5 – Published: 2025-03-21 00:00 – Updated: 2025-03-21 15:08
VLAI
EPSS
VEX
Summary
An issue was discovered in OpenSlides before 4.2.5. During login at the /system/auth/login/ endpoint, the system's response times differ depending on whether a user exists in the system. The timing discrepancy stems from the omitted hashing of the password (e.g., more than 100 milliseconds).
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Intevation | OpenSlides |
Affected:
0 , < 4.2.5
(custom)
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CVE-2025-29780 (GCVE-0-2025-29780)
Vulnerability from cvelistv5 – Published: 2025-03-14 17:26 – Updated: 2025-03-19 15:27
VLAI
EPSS
VEX
Title
Post-Quantum Secure Feldman's Verifiable Secret Sharing has Timing Side-Channels in Matrix Operations
Summary
Post-Quantum Secure Feldman's Verifiable Secret Sharing provides a Python implementation of Feldman's Verifiable Secret Sharing (VSS) scheme. In versions 0.8.0b2 and prior, the `feldman_vss` library contains timing side-channel vulnerabilities in its matrix operations, specifically within the `_find_secure_pivot` function and potentially other parts of `_secure_matrix_solve`. These vulnerabilities are due to Python's execution model, which does not guarantee constant-time execution. An attacker with the ability to measure the execution time of these functions (e.g., through repeated calls with carefully crafted inputs) could potentially recover secret information used in the Verifiable Secret Sharing (VSS) scheme. The `_find_secure_pivot` function, used during Gaussian elimination in `_secure_matrix_solve`, attempts to find a non-zero pivot element. However, the conditional statement `if matrix[row][col] != 0 and row_random < min_value:` has execution time that depends on the value of `matrix[row][col]`. This timing difference can be exploited by an attacker. The `constant_time_compare` function in this file also does not provide a constant-time guarantee. The Python implementation of matrix operations in the _find_secure_pivot and _secure_matrix_solve functions cannot guarantee constant-time execution, potentially leaking information about secret polynomial coefficients. An attacker with the ability to make precise timing measurements of these operations could potentially extract secret information through statistical analysis of execution times, though practical exploitation would require significant expertise and controlled execution environments. Successful exploitation of these timing side-channels could allow an attacker to recover secret keys or other sensitive information protected by the VSS scheme. This could lead to a complete compromise of the shared secret. As of time of publication, no patched versions of Post-Quantum Secure Feldman's Verifiable Secret Sharing exist, but other mitigations are available. As acknowledged in the library's documentation, these vulnerabilities cannot be adequately addressed in pure Python. In the short term, consider using this library only in environments where timing measurements by attackers are infeasible. In the medium term, implement your own wrappers around critical operations using constant-time libraries in languages like Rust, Go, or C. In the long term, wait for the planned Rust implementation mentioned in the library documentation that will properly address these issues.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/DavidOsipov/PostQuantum-Feldma… | x_refsource_CONFIRM |
| https://en.wikipedia.org/wiki/Side-channel_attack | x_refsource_MISC |
| https://www.rambus.com/wp-content/uploads/2015/08… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| DavidOsipov | PostQuantum-Feldman-VSS |
Affected:
<= 0.8.0b2
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CVE-2025-27936 (GCVE-0-2025-27936)
Vulnerability from cvelistv5 – Published: 2025-04-16 09:14 – Updated: 2025-04-16 14:32
VLAI
EPSS
VEX
Title
Webhook Secret Exposure via Timing attack in MSteams plugin
Summary
Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.5.0 , ≤ 10.5.1
(semver)
Unaffected: 10.6.0 Unaffected: 10.5.2 |
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CVE-2025-22234 (GCVE-0-2025-22234)
Vulnerability from cvelistv5 – Published: 2026-01-22 21:02 – Updated: 2026-01-22 21:27
VLAI
EPSS
VEX
Title
Spring Security - BCrypt Password Encoder maximum password length breaks timing attack mitigation
Summary
The fix applied in CVE-2025-22228 inadvertently broke the timing attack mitigation implemented in DaoAuthenticationProvider. This can allow attackers to infer valid usernames or other authentication behavior via response-time differences under certain configurations.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Timing Descrepency
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://spring.io/security/cve-2025-22234/ | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Spring | Spring Security |
Affected:
5.7.16
(semver)
Affected: 5.8.18 (semver) Affected: 6.0.16 (semver) Affected: 6.1.14 (semver) Affected: 6.2.10 (semver) Affected: 6.3.8 (semver) Affected: 6.4.4 (semver) |
Date Public
2025-04-25 15:43
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CVE-2025-20067 (GCVE-0-2025-20067)
Vulnerability from cvelistv5 – Published: 2025-08-12 16:58 – Updated: 2025-08-12 18:25
VLAI
EPSS
VEX
Summary
Observable timing discrepancy in firmware for some Intel(R) CSME and Intel(R) SPS may allow a privileged user to potentially enable information disclosure via local access.
Severity
6 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- Information Disclosure
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Intel(R) CSME and Intel(R) SPS |
Affected:
See references
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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.
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Django would like to thank Stackered for reporting this issue.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
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 (v2.0.3)
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 (v2.0.3)
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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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.