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CVE-2020-8159
CRITICAL
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.
Published: May 12, 2020
Modified: Jun 17, 2026
CWE-22
CWE-22
CVSS Metrics
CVSSv3
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products (2)
| Vendor | Product | Version |
|---|---|---|
| rubyonrails | actionpack_page-caching | * < 1.2.1 |
| debian | debian_linux | 9.0 |
GitHub Security Advisory GHSA-mg5p-95m9-rmfp
Arbitrary file write in actionpack-page_caching gem
rubygems
actionpack-page_caching
< 1.2.1
Fixed: 1.2.1
References (4)
- https://groups.google.com/forum/#%21topic/rubyonrails-security/CFRVkEytdP8
- https://lists.debian.org/debian-lts-announce/2021/07/msg00019.html Mailing List, Third Party Advisory
- https://groups.google.com/forum/#%21topic/rubyonrails-security/CFRVkEytdP8
- https://lists.debian.org/debian-lts-announce/2021/07/msg00019.html Mailing List, Third Party Advisory
Risk Scores
CVSS Score
9.8 / 10
EPSS Score
5.25%
Top 8% most likely to be exploited
Threat Score
40.8 / 100
Data Sources
NVD
EPSS
GitHub