What is CVE-2021-41745?

CVE-2021-41745 is a critical-severity vulnerability in Showdoc, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-10-22.

How severe is CVE-2021-41745?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Showdoc

CVE-2021-41745

ShowDoc 2.8.3 ihas a file upload vulnerability, where attackers can use the vulnerability to obtain server permissions.

Vulnerability class: Unrestricted File Upload

Published 2021-10-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Showdoc — versions 2.8.3

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/purple-WL/SHOWDOC-file-upload-vulnerability (Third Party Advisory)
www.cnvd.org.cn/flaw/show/CNVD-2020-49480 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-41745?: CVE-2021-41745 is a critical-severity vulnerability in Showdoc, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-10-22.
How severe is CVE-2021-41745?: Critical severity. CVSS v3 base score is 9.8 out of 10.