What’s Vulnerable › Vulnerabilities

CVE-2021-29467: Self-XSS

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-22 · updated 2026-06-17
• Weakness: CWE-80

Description

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.

Affected products

• birb-digital wrongthink: before 2.4.1 — fixed in 2.4.1

How to fix

Upgrade to a fixed version: birb-digital wrongthink 2.4.1. Check the vendor advisory for mitigations.

References

• https://github.com/birb-digital/wrongthink/security/advisories/GHSA-529v-f2gf-62w9
• https://github.com/birb-digital/wrongthink/security/advisories/GHSA-529v-f2gf-62w9

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