What is CVE-2021-42250?

CVE-2021-42250 is a medium-severity vulnerability in Apache Superset, classified under Improper Output Neutralization for Logs. CVSS score: 6.5/10. Published 2021-11-17.

How severe is CVE-2021-42250?

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

Vulnerability in Apache Superset

CVE-2021-42250

Improper output neutralization for Logs. A specific Apache Superset HTTP endpoint allowed for an authenticated user to forge log entries or inject malicious content into logs.

Published 2021-11-17 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.018 (77.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: +0.001

Affected products

Apache Superset
Apache Software Foundation Superset — versions Apache Superset

Weakness classification (CWE)

References

lists.apache.org/thread/53lkszw6d3tybp5t99nvgcj538b9trw9 (Mailing List, Vendor Advisory)
www.openwall.com/lists/oss-security/2021/11/17/2 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-42250?: CVE-2021-42250 is a medium-severity vulnerability in Apache Superset, classified under Improper Output Neutralization for Logs. CVSS score: 6.5/10. Published 2021-11-17.
How severe is CVE-2021-42250?: Medium severity. CVSS v3 base score is 6.5 out of 10.