CVE-2022-21650: Convos is an open source multi-user chat that runs in a web browser

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HIGH 7.6UPGRADE

CVE-2022-21650 is a high-severity flaw (CVSS 7.6) affecting convos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Convos is an open source multi-user chat that runs in a web browser. You can't use SVG extension in Convos' chat window, but you can upload a file with an .html extension. By uploading an SVG file with an html extension the upload filter can be bypassed. This causes Stored XSS. Also, after uploading a file the XSS attack is triggered upon a user viewing the file. Through this vulnerability, an attacker is capable to execute malicious scripts. Use

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.9% (top 42%)
CISA exploited list	No
Weakness	CWE-79
Published	2022-01-04
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: convos

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

Am I affected?

Timeline

2022-01-04 21:15 UTCPublished CVE record published
2026-06-17 04:26 UTCUpdated Record last modified

convos convos UPGRADE

Affected: >= 6.48 and < 6.52

Fixed in: 6.52

Safe to downgrade to: a release before 6.48

1. Check installed version

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

2. UPGRADE to 6.52 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade convos

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 6.48 (Debian / Ubuntu)

apt-cache madison convos sudo apt install convos=<VERSION_BEFORE_6.48> sudo apt-mark hold convos

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

dnf --showduplicates list convos sudo dnf downgrade convos-<VERSION_BEFORE_6.48> sudo dnf versionlock add convos

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-2022-21650?

convos: upgrade to 6.52. Exact commands for each OS are on this page.

Is CVE-2022-21650 being exploited?

CVE-2022-21650 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-2022-21650 affect?

CVE-2022-21650 affects convos. Severity is high (CVSS 7.6). Convos is an open source multi-user chat that runs in a web browser. You can't use SVG extension in Convos' chat window, but you can upload a file with an .html extension. By uploading an SVG file with an html extension the upload filter ca

How urgent is CVE-2022-21650?

Priority 46/100. High severity; Public exploit reference

Related CVEs

CVE-2022-21649 HIGH 7.6 UPGRADE Convos is an open source multi-user chat that runs in a web browser
CVE-2021-42584 MEDIUM 5.4 UPGRADE A Stored Cross Site Scripting (XSS) issue exists in Convos-Chat before 6.32.

References

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