What is CVE-2021-39169?

CVE-2021-39169 is a high-severity vulnerability in Misskey, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2021-08-27.

How severe is CVE-2021-39169?

High severity. CVSS v3 base score is 8.0 out of 10.

XSS in Misskey

CVE-2021-39169

Misskey is a decentralized microblogging platform. In versions of Misskey prior to 12.51.0, malicious actors can use the web client built-in dialog to display a malicious string, leading to cross-site scripting (XSS). XSS could compromise…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.007 (50.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

Affected products

Misskey
Misskey-dev Misskey — versions < 12.51.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-39169?: CVE-2021-39169 is a high-severity vulnerability in Misskey, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2021-08-27.
How severe is CVE-2021-39169?: High severity. CVSS v3 base score is 8.0 out of 10.