CVE-2020-8264
CVSS v3
6.1
MEDIUM
EPSS Score
67.0 %
exploit probability, as of 2026-10-19
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- actionpackRubyGemsfrom 6.0.0 · fixed in 6.0.3.4
Vendor advisories
- CVE-2020-8264 Red Hat Product Security
rubygem-actionpack: possible XSS vulnerability in Action Pack in development mode
Description
In actionpack gem >= 6.0.0, a possible XSS vulnerability exists when an application is running in development mode allowing an attacker to send or embed (in another page) a specially crafted URL which can allow the attacker to execute JavaScript in the context of the local application. This vulnerability is in the Actionable Exceptions middleware.
Technical details
- Published
- 2021-01-06
Frequently asked questions
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