PatchTheCVECVE-2016-1221: Jetstar App for iOS before 3.0.0 does not verify X.509 certificates from SSL servers, which allows man-in-the-
CVE-2016-1221 is a medium-severity flaw (CVSS 5.9) affecting jetstar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Jetstar App for iOS before 3.0.0 does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.9 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.6% (top 49%) |
| CISA exploited list | No |
| Weakness | CWE-295 |
| Published | 2017-04-21 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2016-1221?
jetstar: upgrade to newer than 2.4.1. Exact commands for each OS are on this page.
Is CVE-2016-1221 being exploited?
CVE-2016-1221 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2016-1221 affect?
CVE-2016-1221 affects jetstar. Severity is medium (CVSS 5.9). Jetstar App for iOS before 3.0.0 does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
How urgent is CVE-2016-1221?
Priority 38/100. Remotely exploitable, no login, no user action