CVE-2021-20834: Improper authorization in handler for custom URL scheme vulnerability in Nike App for Android versions prior t

Q: How do I fix CVE-2021-20834?

nike: upgrade to 2.177.1; nike: upgrade to 2.177.3.3688. Exact commands for each OS are on this page.

Q: Is CVE-2021-20834 being exploited?

CVE-2021-20834 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-20834 affect?

CVE-2021-20834 affects nike, nike. Severity is medium (CVSS 6.1). Improper authorization in handler for custom URL scheme vulnerability in Nike App for Android versions prior to 2.177 and Nike App for iOS versions prior to 2.177.1 allows a remote attacker to lead a user to access an arbitrary website via

Q: How urgent is CVE-2021-20834?

Priority 38/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADEUPGRADE

CVE-2021-20834 is a medium-severity flaw (CVSS 6.1) affecting nike, nike. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper authorization in handler for custom URL scheme vulnerability in Nike App for Android versions prior to 2.177 and Nike App for iOS versions prior to 2.177.1 allows a remote attacker to lead a user to access an arbitrary website via the vulnerable App.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-862
Published	2021-10-13
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: nike

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-10-13 09:15 UTCPublished CVE record published
2026-06-17 03:34 UTCUpdated Record last modified

nike nike UPGRADE

Affected: < 2.177.1

Fixed in: 2.177.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nike || rpm -q nike || nike --version

2. UPGRADE to 2.177.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nike

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nike

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

nike nike UPGRADE

Affected: < 2.177.3.3688

Fixed in: 2.177.3.3688

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nike || rpm -q nike || nike --version

2. UPGRADE to 2.177.3.3688 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nike

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nike

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2021-20834?

nike: upgrade to 2.177.1; nike: upgrade to 2.177.3.3688. Exact commands for each OS are on this page.

Is CVE-2021-20834 being exploited?

CVE-2021-20834 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-2021-20834 affect?

CVE-2021-20834 affects nike, nike. Severity is medium (CVSS 6.1). Improper authorization in handler for custom URL scheme vulnerability in Nike App for Android versions prior to 2.177 and Nike App for iOS versions prior to 2.177.1 allows a remote attacker to lead a user to access an arbitrary website via

How urgent is CVE-2021-20834?

Priority 38/100. No elevated risk signals yet.

Software pages

Android vulnerabilities · iOS vulnerabilities

References

← Back to latest CVEs