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CVE-2019-16263

22
FAUCET Score

CVE-2019-16263 describes a critical vulnerability in the Twitter Kit framework for iOS, affecting versions up to 3.4.2, where improper SSL certificate validation could allow for man-in-the-middle attacks. With a CVSS score of 7.4 (HIGH), this vulnerability has a network attack vector and high impact on confidentiality and integrity, despite requiring high attack complexity. Although the product is end-of-life, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.4.2CPE matchmatch criteria
cpe:2.3:a:twitter:twitter_kit:*:*:*:*:*:iphone_os:*:*

CVSS Data

CVSS version used by this source: 3.1

7.4HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.03%
Probability of exploitation in next 30 days
EPSS Percentile
60.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0103 is in the 24th percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

blog.appicaptor.com / 2019/10/04/vulnerable-library-warning-twitterkit-for-ios
Third Party Advisory
github.com / twitter-archive/twitter-kit-ios/blob/ac42e1351a66afa5ff7718d04d64a905dafe1f41/TwitterCore/TwitterCore/Networking/Security/TWTRServerTrustEvaluator.m
Third Party Advisory
sit.fraunhofer.de / fileadmin/dokumente/CVE/Advisory_TwitterKit_for_iOS_CVE-2019-16263.pdf
ExploitThird Party Advisory