CVE-2022-31013: Chat Server is the chat server for Vartalap, an open-source messaging application

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2022-31013 is a critical-severity flaw (CVSS 9.1) affecting chat server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Chat Server is the chat server for Vartalap, an open-source messaging application. Versions 2.3.2 until 2.6.0 suffer from a bug in validating the access token, resulting in authentication bypass. The function `this.authProvider.verifyAccessKey` is an async function, as the code is not using `await` to wait for the verification result. Every time the function responds back with success, along with an unhandled exception if the token is invalid. A

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-287, CWE-20
Published	2022-05-31
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: chat server project

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

Am I affected?

Timeline

2022-05-31 23:15 UTCPublished CVE record published
2026-06-17 04:44 UTCUpdated Record last modified

chat server project chat server UPGRADE

Affected: >= 2.3.2 and < 2.6.0

Fixed in: 2.6.0

Safe to downgrade to: a release before 2.3.2

1. Check installed version

apt-cache policy chat-server || rpm -q chat-server || chat-server --version

2. UPGRADE to 2.6.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade chat-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chat-server

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 2.3.2 (Debian / Ubuntu)

apt-cache madison chat-server sudo apt install chat-server=<VERSION_BEFORE_2.3.2> sudo apt-mark hold chat-server

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

dnf --showduplicates list chat-server sudo dnf downgrade chat-server-<VERSION_BEFORE_2.3.2> sudo dnf versionlock add chat-server

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-2022-31013?

chat server: upgrade to 2.6.0. Exact commands for each OS are on this page.

Is CVE-2022-31013 being exploited?

CVE-2022-31013 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-2022-31013 affect?

CVE-2022-31013 affects chat server. Severity is critical (CVSS 9.1). Chat Server is the chat server for Vartalap, an open-source messaging application. Versions 2.3.2 until 2.6.0 suffer from a bug in validating the access token, resulting in authentication bypass. The function `this.authProvider.verifyAccess

How urgent is CVE-2022-31013?

Priority 55/100. Critical severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs