CVE-2021-29467: Wrongthink is an encrypted peer-to-peer chat program

Q: How do I fix CVE-2021-29467?

wrongthink: upgrade to 2.4.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-29467 being exploited?

CVE-2021-29467 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-2021-29467 affect?

CVE-2021-29467 affects wrongthink. Severity is medium (CVSS 6.1). Wrongthink is an encrypted peer-to-peer chat program. A user could check their fingerprint into the service and enter a script to run arbitrary JavaScript on the site. No workarounds exist, but a patch exists in version 2.4.1.

Q: How urgent is CVE-2021-29467?

Priority 37/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2021-29467 is a medium-severity flaw (CVSS 6.1) affecting wrongthink. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Wrongthink is an encrypted peer-to-peer chat program. A user could check their fingerprint into the service and enter a script to run arbitrary JavaScript on the site. No workarounds exist, but a patch exists in version 2.4.1.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-80, CWE-79
Published	2021-04-22
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2021-04-22 00:15 UTCPublished CVE record published
2026-06-17 03:47 UTCUpdated Record last modified

wrongthink project wrongthink UPGRADE

Affected: < 2.4.1

Fixed in: 2.4.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.4.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wrongthink

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-2021-29467?

wrongthink: upgrade to 2.4.1. Exact commands for each OS are on this page.

Is CVE-2021-29467 being exploited?

CVE-2021-29467 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-2021-29467 affect?

CVE-2021-29467 affects wrongthink. Severity is medium (CVSS 6.1). Wrongthink is an encrypted peer-to-peer chat program. A user could check their fingerprint into the service and enter a script to run arbitrary JavaScript on the site. No workarounds exist, but a patch exists in version 2.4.1.

How urgent is CVE-2021-29467?

Priority 37/100. Public exploit reference

Related CVEs

CVE-2021-21387 HIGH 8.1 UPGRADE Wrongthink peer-to-peer, end-to-end encrypted messenger with PeerJS and Axolotl ratchet

References

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