CVE-2017-16905: The DuoLingo TinyCards application before 1.0 for Android has one use of unencrypted HTTP, which allows remote

Q: How do I fix CVE-2017-16905?

tinycards: upgrade to 1.0. Exact commands for each OS are on this page.

Q: Is CVE-2017-16905 being exploited?

CVE-2017-16905 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-2017-16905 affect?

CVE-2017-16905 affects tinycards. Severity is high (CVSS 8.1). The DuoLingo TinyCards application before 1.0 for Android has one use of unencrypted HTTP, which allows remote attackers to spoof content, and consequently achieve remote code execution, via a man-in-the-middle attack.

Q: How urgent is CVE-2017-16905?

Priority 61/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.1REMOTEUPGRADE

CVE-2017-16905 is a high-severity flaw (CVSS 8.1) affecting tinycards. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The DuoLingo TinyCards application before 1.0 for Android has one use of unencrypted HTTP, which allows remote attackers to spoof content, and consequently achieve remote code execution, via a man-in-the-middle attack.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	3.5% (top 11%)
CISA exploited list	No
Weakness	CWE-94
Published	2018-01-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: duolingo

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

Am I affected?

Timeline

2018-01-05 08:29 UTCPublished CVE record published
2026-06-17 01:10 UTCUpdated Record last modified

duolingo tinycards UPGRADE

Affected: < 1.0

Fixed in: 1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tinycards

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-2017-16905?

tinycards: upgrade to 1.0. Exact commands for each OS are on this page.

Is CVE-2017-16905 being exploited?

CVE-2017-16905 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-2017-16905 affect?

CVE-2017-16905 affects tinycards. Severity is high (CVSS 8.1). The DuoLingo TinyCards application before 1.0 for Android has one use of unencrypted HTTP, which allows remote attackers to spoof content, and consequently achieve remote code execution, via a man-in-the-middle attack.

How urgent is CVE-2017-16905?

Priority 61/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Android vulnerabilities

References

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