MEDIUM
In JetBrains Ktor before 1.4.3, HTTP Request Smuggling was possible
Published Feb 3, 2021
5.3
MEDIUMCVSS 3.1
EPSS 0.81%
Description
In JetBrains Ktor before 1.4.3, HTTP Request Smuggling was possible.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
5.3 MEDIUM NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact Low
Availability Impact None
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.81% 0.00809
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.00809
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.81% (0.00809) | 55.41th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.81% (0.00809) | 55.35th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.09% (0.00090) | 39.04th | v3 (v2023.03.01) |
| Oct 20, 2023 | 0.09% (0.00090) | 37.95th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00078) | 31.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.74% (0.02742) | 63.06th | v1 |
| Jan 6, 2022 | 2.74% (0.02742) | 62.72th | v1 |
| Jan 5, 2022 | 0.62% (0.00624) | 46.35th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
Weaknesses (1)
References (2)
- https://blog.jetbrains.com x_refsource_MISCProduct
- https://blog.jetbrains.com/blog/2021/02/03/jetbrains-security-bulletin-q4-2020/ x_refsource_MISCVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://blog.jetbrains.com | x_refsource_MISCProduct | |
| https://blog.jetbrains.com/blog/2021/02/03/jetbrains-security-bulletin-q4-2020/ | x_refsource_MISCVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Feb 3, 2021
Updated Aug 3, 2024
Reserved Jan 21, 2021
Link CVE-2021-25762
CISA Vulnrichment
Updated n/a