What is CVE-2019-1020010?

CVE-2019-1020010 is a medium-severity vulnerability in Misskey, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-07-29.

How severe is CVE-2019-1020010?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2019-1020010 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Misskey

CVE-2019-1020010

Misskey before 10.102.4 allows hijacking a user's token.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-07-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.013 (68.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Misskey — versions 11.0.0, < 10.102.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

github.com/syuilo/misskey/security/advisories/GHSA-6qw9-6jxq-xj3p (Exploit, Third Party Advisory, Mitigation)

Frequently asked questions

What is CVE-2019-1020010?: CVE-2019-1020010 is a medium-severity vulnerability in Misskey, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-07-29.
How severe is CVE-2019-1020010?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2019-1020010 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.