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+---
+gem: cassandra-web
+cve: 2020-36939
+ghsa: 8mfv-xhp5-48q9
+url: https://nvd.nist.gov/vuln/detail/CVE-2020-36939
+title: Cassandra Web 0.5.0 contains a directory traversal vulnerability
+date: 2026-01-27
+description: |
+  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 sensitive system files
+  like /etc/passwd and retrieve Apache Cassandra database credentials.
+cvss_v3: 7.5
+cvss_v4: 8.7
+related:
+  url:
+    - https://nvd.nist.gov/vuln/detail/CVE-2020-36939
+    - https://github.com/avalanche123/cassandra-web/commit/f11e47a26f316827f631d7bcfec14b9dd94f44be#diff-f965f92b425fb2f75d38b491b2625fe21b8af20b7666217546bce8a42b198ea4Prot
+    - https://www.vulncheck.com/advisories/cassandra-web-remote-file-read
+    - https://www.exploit-db.com/exploits/49362
+    - https://github.com/advisories/GHSA-8mfv-xhp5-48q9
+notes: |
+  - GHSA is unreviewed.
+  - cvss_v4 from GHSA and nvd.nist.gov
+  - cvss_v3 from nvd.nist.gov
+  - date from GHSA
+  - Last commit (included above) on 9/30/2020 changed "disable" to "enable"
+    but was never released.
+  - Release 0.5.0 (https://rubygems.org/gems/cassandra-web/versions/0.5.0)
+    is last release on https://rubygems.org/gems/cassandra-web/versions.
+    - Only one tag (0.4.0) at https://github.com/avalanche123/cassandra-web/tags.