Cross site scripting vulnerability in ActionView

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

4.8 · CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS

• CVE-2020-5267: 1.52% estimated exploitation activity in the next 30 days; percentile 74.69 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

There is a possible cross site scripting (XSS) vulnerability in ActionView's JavaScript literal escape helpers. Views that use the j or escapejavascript methods may be susceptible to XSS attacks. Impact There is a possible XSS vulnerability in the j and escapejavascript methods in ActionView. These methods are used for escaping JavaScript string literals. Impacted code will look something like this: or Releases The 6.0.2.2 and 5.2.4.2 releases are available at the normal locations. Workarounds For those that can't upgrade, the following monkey patch may be used: Patches To aid users who aren't able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a single changeset. 5-2-js-helper-xss.patch - Patch for 5.2 series 6-0-js-helper-xss.patch - Patch for 6.0 series Please note that only the 5.2 and 6.0 series are supported at present. Users of earlier unsupported releases are advised to upgrade as soon as possible…

Published by the source

19 Mar 2020, 17:30 UTC

Last modified by the source

3 Feb 2023, 20:47 UTC

Source last checked

26 Oct 2026, 15:44 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-65cv-r6x7-79hv

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# Patch Next advisory brief: CVE-2020-5267

Advisory: Cross site scripting vulnerability in ActionView
IDs: CVE-2020-5267, GHSA-65cv-r6x7-79hv
Record: https://patchnext.com/advisories/cve-2020-5267 (revision 1, source checked 26 Oct 2026, 15:44 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: actionview 6.0.2.2, 5.2.4.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- RubyGems actionview: affected <= 5.2.4.1; >= 6.0.0, <= 6.0.2.1; fixed in 5.2.4.2, 6.0.2.2

## Suggested inspection (read-only)
- RubyGems actionview: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on actionview.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-65cv-r6x7-79hv (GitHub-reviewed advisory GHSA-65cv-r6x7-79hv lists affected ranges: RubyGems actionview >=0 =6.0.0 <=6.0.2.1)

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