CVE-2021-21367: Switchboard Bluetooth Plug for elementary OS from version 2.3.0 and before version version 2.3.5 has an incorr

Routine

MEDIUM 6.1UPGRADEMITIGATE

CVE-2021-21367 is a medium-severity flaw (CVSS 6.1) affecting switchboard bluetooth plug, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Switchboard Bluetooth Plug for elementary OS from version 2.3.0 and before version version 2.3.5 has an incorrect authorization vulnerability. When the Bluetooth plug is running (in discoverable mode), Bluetooth service requests and pairing requests are automatically accepted, allowing physically proximate attackers to pair with a device running an affected version of switchboard-plug-bluetooth without the active consent of the user. By default,

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 49%)
CISA exploited list	No
Weakness	CWE-863
Published	2021-03-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: elementary · fedoraproject

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

Am I affected?

Timeline

2021-03-12 17:15 UTCPublished CVE record published
2026-06-17 03:35 UTCUpdated Record last modified

elementary switchboard bluetooth plug UPGRADE

Affected: >= 2.3.0 and < 2.3.5

Fixed in: 2.3.5

Safe to downgrade to: a release before 2.3.0

1. Check installed version

apt-cache policy switchboard-bluetooth-plug || rpm -q switchboard-bluetooth-plug || switchboard-bluetooth-plug --version

2. UPGRADE to 2.3.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade switchboard-bluetooth-plug

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade switchboard-bluetooth-plug

Note

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

3. If no update is available yet, DOWNGRADE to a release before 2.3.0 (Debian / Ubuntu)

apt-cache madison switchboard-bluetooth-plug sudo apt install switchboard-bluetooth-plug=<VERSION_BEFORE_2.3.0> sudo apt-mark hold switchboard-bluetooth-plug

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list switchboard-bluetooth-plug sudo dnf downgrade switchboard-bluetooth-plug-<VERSION_BEFORE_2.3.0> sudo dnf versionlock add switchboard-bluetooth-plug

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

fedoraproject fedora MITIGATE

Affected: 32 · 33

Fixed in: no fixed release known

Safe to downgrade to: a release before 32

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2021-21367?

switchboard bluetooth plug: upgrade to 2.3.5; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-21367 being exploited?

CVE-2021-21367 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-2021-21367 affect?

CVE-2021-21367 affects switchboard bluetooth plug, fedora. Severity is medium (CVSS 6.1). Switchboard Bluetooth Plug for elementary OS from version 2.3.0 and before version version 2.3.5 has an incorrect authorization vulnerability. When the Bluetooth plug is running (in discoverable mode), Bluetooth service requests and pairing

How urgent is CVE-2021-21367?

Priority 34/100. No elevated risk signals yet.

Software pages

Bluetooth vulnerabilities

References

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