How severe is CVE-2019-16263?

CVE-2019-16263 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2019-16263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-16263?

CVE-2019-16263 affects Twitter Twitter Kit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-16263?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-16263 published?

CVE-2019-16263 was published on 2019-10-07 and last updated on 2026-06-17.

CVE-2019-16263

CVE-2019-16263 is a high-severity vulnerability in Twitter Twitter Kit with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: High (CVSS 3.x base score 7.4)
CVSS v2: 5.8
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Twitter Twitter Kit
Published: 2019-10-07
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2019-16263?: 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.
How severe is CVE-2019-16263?: CVE-2019-16263 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2019-16263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-16263?: CVE-2019-16263 affects Twitter Twitter Kit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-16263?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-16263 published?: CVE-2019-16263 was published on 2019-10-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:twitter:twitter_kit:*:*:*:*:*:iphone_os:*:*

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