What is CVE-2020-17363?

CVE-2020-17363 is a critical-severity vulnerability in Usvn, classified under OS Command Injection. CVSS score: 9.9/10. Published 2020-12-31.

How severe is CVE-2020-17363?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Is CVE-2020-17363 known to be exploited?

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

RCE in Usvn

CVE-2020-17363

USVN (aka User-friendly SVN) before 1.0.9 allows remote code execution via shell metacharacters in the number_start or number_end parameter to LastHundredRequest (aka lasthundredrequestAction) in the Timeline module. NOTE: this may overlap CVE-2020-25069.

Vulnerability class: Command Injection (OS Command Injection)

Published 2020-12-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.046 (91.3th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.3% 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: 0.046 · change: +0.002

Affected products

Usvn

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

References

sysdream.com/news/lab/2020-08-12-cve-2020-17363-usvn-remote-code-execution/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-17363?: CVE-2020-17363 is a critical-severity vulnerability in Usvn, classified under OS Command Injection. CVSS score: 9.9/10. Published 2020-12-31.
How severe is CVE-2020-17363?: Critical severity. CVSS v3 base score is 9.9 out of 10.
Is CVE-2020-17363 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.