{"cve":"CVE-2020-8159","nvd":{"published":"2020-05-12T13:15:13.250","modified":"2026-06-17T03:25:57.750","status":"Modified","description":"There is a vulnerability in actionpack_page-caching gem < v1.2.1 that allows an attacker to write arbitrary files to a web server, potentially resulting in remote code execution if the attacker can write unescaped ERB to a view.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-22"],"references":["https://groups.google.com/forum/#%21topic/rubyonrails-security/CFRVkEytdP8","https://lists.debian.org/debian-lts-announce/2021/07/msg00019.html","https://groups.google.com/forum/#%21topic/rubyonrails-security/CFRVkEytdP8","https://lists.debian.org/debian-lts-announce/2021/07/msg00019.html"],"products":["debian:debian_linux","rubyonrails:actionpack_page-caching"],"source":"nvd","synced_at":"2026-10-19T21:04:18.695612450+00:00"},"epss":{"cve":"CVE-2020-8159","score":0.0538,"percentile":0.92663,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-mg5p-95m9-rmfp","url":"https://osv.dev/vulnerability/GHSA-mg5p-95m9-rmfp","summary":"Arbitrary file write in actionpack-page_caching gem","modified":"2023-11-08T04:04:14.565776Z","packages":[{"ecosystem":"RubyGems","name":"actionpack-page_caching","purl":"pkg:gem/actionpack-page_caching","ranges":["<1.2.1"],"fixed":["1.2.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}