The Twitter Kit framework through 3.4.2 for iOS does not properly validate the api.twitter.com SSL certificate
Published Oct 7, 2019
7.4
HIGHCVSS 3.1
EPSS 1.03%
Description
The Twitter Kit framework through 3.4.2 for iOS does not properly validate the api.twitter.com SSL certificate. Although the certificate chain must contain one of a set of pinned certificates, there are certain implementation errors such as a lack of hostname verification. NOTE: this is an end-of-life product.
Affected products
No data.
- ≤ 3.4.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/A:N
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 2, 2026.
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 2, 2026 | 1.03% (0.01025) | 62.31th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.03% (0.01025) | 62.06th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.24% (0.00238) | 62.33th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.24% (0.00238) | 62.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.24% (0.00238) | 60.07th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.49% (0.12492) | 89.83th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.63% (0.03630) | 71.73th | v1 |
| Jan 6, 2022 | 3.63% (0.03630) | 71.48th | v1 |
| Jan 5, 2022 | 0.83% (0.00833) | 58.90th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (3)
- https://blog.appicaptor.com/2019/10/04/vulnerable-library-warning-twitterkit-for-ios/ x_refsource_MISCThird Party Advisory
- https://github.com/twitter-archive/twitter-kit-ios/blob/ac42e1351a66afa5ff7718d04d64a905dafe1f41/TwitterCore/TwitterCore/Networking/Security/TWTRServerTrustEvaluator.m#L75-L81 x_refsource_MISCThird Party Advisory
- https://www.sit.fraunhofer.de/fileadmin/dokumente/CVE/Advisory_TwitterKit_for_iOS_CVE-2019-16263.pdf x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://blog.appicaptor.com/2019/10/04/vulnerable-library-warning-twitterkit-for-ios/ | x_refsource_MISCThird Party Advisory | |
| https://github.com/twitter-archive/twitter-kit-ios/blob/ac42e1351a66afa5ff7718d04d64a905dafe1f41/TwitterCore/TwitterCore/Networking/Security/TWTRServerTrustEvaluator.m#L75-L81 | x_refsource_MISCThird Party Advisory | |
| https://www.sit.fraunhofer.de/fileadmin/dokumente/CVE/Advisory_TwitterKit_for_iOS_CVE-2019-16263.pdf | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.