CVE-2022-24968: In Mellium mellium.im/xmpp through 0.21.0, an attacker capable of spoofing DNS TXT records can redirect a WebS

Routine

MEDIUM 5.9REMOTEUPGRADE

CVE-2022-24968 is a medium-severity flaw (CVSS 5.9) affecting xmpp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Mellium mellium.im/xmpp through 0.21.0, an attacker capable of spoofing DNS TXT records can redirect a WebSocket connection request to a server under their control without causing TLS certificate verification to fail. This occurs because the wrong host name is selected during this verification.

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	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-295
Published	2022-02-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mellium

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

Am I affected?

Timeline

2022-02-11 22:15 UTCPublished CVE record published
2026-06-17 04:32 UTCUpdated Record last modified

mellium xmpp UPGRADE

Affected: >= 0.18.0 and < 0.21.1

Fixed in: 0.21.1

Safe to downgrade to: a release before 0.18.0

1. Check installed version

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

2. UPGRADE to 0.21.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xmpp

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 0.18.0 (Debian / Ubuntu)

apt-cache madison xmpp sudo apt install xmpp=<VERSION_BEFORE_0.18.0> sudo apt-mark hold xmpp

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

dnf --showduplicates list xmpp sudo dnf downgrade xmpp-<VERSION_BEFORE_0.18.0> sudo dnf versionlock add xmpp

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.

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-2022-24968?

xmpp: upgrade to 0.21.1. Exact commands for each OS are on this page.

Is CVE-2022-24968 being exploited?

CVE-2022-24968 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-2022-24968 affect?

CVE-2022-24968 affects xmpp. Severity is medium (CVSS 5.9). In Mellium mellium.im/xmpp through 0.21.0, an attacker capable of spoofing DNS TXT records can redirect a WebSocket connection request to a server under their control without causing TLS certificate verification to fail. This occurs because

How urgent is CVE-2022-24968?

Priority 37/100. Remotely exploitable, no login, no user action

References

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