What is CVE-2021-21501?

CVE-2021-21501 is a high-severity vulnerability in Apache Servicecomb, classified under Path Traversal. CVSS score: 7.5/10. Published 2021-08-10.

How severe is CVE-2021-21501?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Apache Servicecomb

CVE-2021-21501

Improper configuration will cause ServiceComb ServiceCenter Directory Traversal problem in ServcieCenter 1.x.x versions and fixed in 2.0.0.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2021-08-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.044 (91.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.044 · newest: 0.044 · change: 0.000

Affected products

Apache Servicecomb
Apache Software Foundation Servicecomb — versions Apache ServiceComb-Service-Center 1.x

Weakness classification (CWE)

CWE-22 — Path Traversal

References

lists.apache.org/thread.html/r337be65e504eac52a12e89d7de40345e5d335deee9dd7288f… (Mailing List, Vendor Advisory)
lists.apache.org/thread.html/r337be65e504eac52a12e89d7de40345e5d335deee9dd7288f… (mailing-list)
www.openwall.com/lists/oss-security/2021/08/10/3 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-21501?: CVE-2021-21501 is a high-severity vulnerability in Apache Servicecomb, classified under Path Traversal. CVSS score: 7.5/10. Published 2021-08-10.
How severe is CVE-2021-21501?: High severity. CVSS v3 base score is 7.5 out of 10.