vBulletin through 5.3.x on Windows allows remote PHP code execution because a require_once call is reachable with an unauthenticated request that can include directory traversal sequences to specify an arbitrary pathname, and because ../ traversal is blocked but ..\ traversal is not blocked
Published Dec 14, 2017
9.8
CRITICALCVSS 3.1
EPSS 3.05%
Description
vBulletin through 5.3.x on Windows allows remote PHP code execution because a require_once call is reachable with an unauthenticated request that can include directory traversal sequences to specify an arbitrary pathname, and because ../ traversal is blocked but ..\ traversal is not blocked. For example, an attacker can make an invalid HTTP request containing PHP code, and then make an index.php?routestring= request with enough instances of ".." to reach an Apache HTTP Server log file.
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:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.05% (0.03050) | 87.10th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.05% (0.03050) | 85.80th | v5 (v2026.06.15) |
| Mar 17, 2026 | 4.66% (0.04658) | 89.18th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.35% (0.01354) | 78.34th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.53% (0.03530) | 79.20th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.35% (0.01354) | 78.80th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.95% (0.01947) | 88.37th | v3 (v2023.03.01) |
| Jul 17, 2024 | 0.70% (0.00705) | 80.56th | v3 (v2023.03.01) |
| Apr 11, 2024 | 0.65% (0.00652) | 79.14th | v3 (v2023.03.01) |
| Nov 23, 2023 | 0.65% (0.00652) | 77.14th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.92% (0.00925) | 80.53th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.60% (0.01599) | 75.52th | v2 (v2022.01.01) |
| Jan 12, 2023 | 1.60% (0.01599) | 74.90th | v2 (v2022.01.01) |
| Nov 8, 2022 | 1.30% (0.01298) | 67.75th | v2 (v2022.01.01) |
| Sep 9, 2022 | 1.19% (0.01190) | 60.49th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.09% (0.01086) | 49.83th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.09% (0.01086) | 28.42th | v2 (v2022.01.01) |
| Feb 3, 2022 | 7.76% (0.07761) | 84.60th | v1 |
| Jan 6, 2022 | 7.76% (0.07761) | 84.42th | v1 |
| Sep 1, 2021 | 7.76% (0.07761) | 92.22th | v1 |
| Apr 14, 2021 | 7.76% (0.07761) | 0.00th | v1 |
References (1)
- https://blogs.securiteam.com/index.php/archives/3569 x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://blogs.securiteam.com/index.php/archives/3569 | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.