What is CVE-2020-36939?

CVE-2020-36939 is a high-severity vulnerability in Avalanche123 Cassandra Web, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-01-27.

How severe is CVE-2020-36939?

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

Is CVE-2020-36939 known to be exploited?

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

Path Traversal in Avalanche123 Cassandra Web

CVE-2020-36939

Cassandra Web 0.5.0 contains a directory traversal vulnerability that allows unauthenticated attackers to read arbitrary files by manipulating path traversal parameters. Attackers can exploit the disabled Rack::Protection module to read se…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.589 (98.3th percentile) — read the EPSS interpretation.

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.

Affected products

Avalanche123 Cassandra Web — versions 0.5.0

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

rapid7/metasploit-framework

References

ExploitDB-49362 (exploit)
Cassandra Web GitHub Repository (product)
Cassandra Web RubyGems Package (product)
VulnCheck Advisory: Cassandra Web 0.5.0 - Remote File Read (third-party-advisory)

Frequently asked questions

What is CVE-2020-36939?: CVE-2020-36939 is a high-severity vulnerability in Avalanche123 Cassandra Web, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-01-27.
How severe is CVE-2020-36939?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-36939 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.