What is CVE-2021-39394?

CVE-2021-39394 is a medium-severity vulnerability in Mm-Wiki Project, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2022-08-26.

How severe is CVE-2021-39394?

Medium severity. CVSS v3 base score is 6.5 out of 10.

CSRF in Mm-Wiki Project

CVE-2021-39394

mm-wiki v0.2.1 was discovered to contain a Cross-Site Request Forgery (CSRF) which allows attackers to arbitrarily add user accounts and modify user information.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2022-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.0th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Mm-Wiki Project — versions 0.2.1

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

github.com/phachon/mm-wiki/issues/316 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-39394?: CVE-2021-39394 is a medium-severity vulnerability in Mm-Wiki Project, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2022-08-26.
How severe is CVE-2021-39394?: Medium severity. CVSS v3 base score is 6.5 out of 10.