CVE-2019-5961: The Android App 'Tootdon for Mastodon' version 3.4.1 and earlier does not verify X.509 certificates from SSL s

Q: How do I fix CVE-2019-5961?

tootdon for mastodon: upgrade to newer than 3.4.1. Exact commands for each OS are on this page.

Q: Is CVE-2019-5961 being exploited?

CVE-2019-5961 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-2019-5961 affect?

CVE-2019-5961 affects tootdon for mastodon. Severity is high (CVSS 7.4). The Android App 'Tootdon for Mastodon' version 3.4.1 and earlier 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.

Q: How urgent is CVE-2019-5961?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.4REMOTEUPGRADE

CVE-2019-5961 is a high-severity flaw (CVSS 7.4) affecting tootdon for mastodon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Android App 'Tootdon for Mastodon' version 3.4.1 and earlier 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

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
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	2019-07-05
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: mastodon-tootdon

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

Am I affected?

Timeline

2019-07-05 14:15 UTCPublished CVE record published
2026-06-17 02:38 UTCUpdated Record last modified

mastodon-tootdon tootdon for mastodon UPGRADE

Affected: <= 3.4.1

Fixed in: newer than 3.4.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tootdon-for-mastodon || rpm -q tootdon-for-mastodon || tootdon-for-mastodon --version

2. UPGRADE to newer than 3.4.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tootdon-for-mastodon

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tootdon-for-mastodon

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-2019-5961?

tootdon for mastodon: upgrade to newer than 3.4.1. Exact commands for each OS are on this page.

Is CVE-2019-5961 being exploited?

CVE-2019-5961 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-2019-5961 affect?

CVE-2019-5961 affects tootdon for mastodon. Severity is high (CVSS 7.4). The Android App 'Tootdon for Mastodon' version 3.4.1 and earlier 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-2019-5961?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

Software pages

Android vulnerabilities

References

← Back to latest CVEs