The authentication method in Laravel 8.x through 9.x before 9.32.0 was discovered to be vulnerable to user enumeration via timeless timing attacks with HTTP/2 multiplexing
Published Apr 25, 2023
5.3
MEDIUMCVSS 3.1
EPSS 0.89%
Description
The authentication method in Laravel 8.x through 9.x before 9.32.0 was discovered to be vulnerable to user enumeration via timeless timing attacks with HTTP/2 multiplexing. This is caused by the early return inside the hasValidCredentials method in the Illuminate\Auth\SessionGuard class when a user is found to not exist.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Feb 3, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.89% (0.00888) | 57.92th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.88% (0.00881) | 54.24th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.23% (0.00228) | 43.54th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.13% (0.00129) | 49.46th | v3 (v2023.03.01) |
| May 27, 2024 | 0.12% (0.00120) | 46.25th | v3 (v2023.03.01) |
| May 1, 2024 | 0.11% (0.00107) | 42.71th | v3 (v2023.03.01) |
| Mar 25, 2024 | 0.07% (0.00075) | 30.48th | v3 (v2023.03.01) |
| May 5, 2023 | 0.06% (0.00063) | 24.91th | v3 (v2023.03.01) |
| Apr 26, 2023 | 0.04% (0.00045) | 12.25th | v3 (v2023.03.01) |
References (4)
- https://ephort.dk/blog/laravel-timing-attack-vulnerability/ ExploitTechnical DescriptionThird Party Advisory
- https://github.com/ephort/laravel-user-enumeration-demo ExploitThird Party Advisory
- https://github.com/laravel/framework/pull/44069 PatchVendor Advisory
- https://github.com/laravel/framework/releases/tag/v9.32.0 Release Notes
| Link | Providers | Tags |
|---|---|---|
| https://ephort.dk/blog/laravel-timing-attack-vulnerability/ | ExploitTechnical DescriptionThird Party Advisory | |
| https://github.com/ephort/laravel-user-enumeration-demo | ExploitThird Party Advisory | |
| https://github.com/laravel/framework/pull/44069 | PatchVendor Advisory | |
| https://github.com/laravel/framework/releases/tag/v9.32.0 | Release Notes |
Change history (0)
No recorded changes yet.