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Vulnerabilities

Vulnerability · CVE-2021-22885

A possible information disclosure / unintended method execution vulnerability in Action Pack >= 2.0.0 when using the or helper with untrusted user input.

Published May 27, 2021 · catalog updated Jun 17, 2026 · the affected product

Last checked Nov 8, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2021-22885. EPSS is 4.05%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
4.05%
Remediation
Version ranges on file
Affected products
cpe debian/debian linux · cpe rubyonrails/actionpack page-caching · cpe rubyonrails/rails

A possible information disclosure / unintended method execution vulnerability in Action Pack >= 2.0.0 when using the or helper with untrusted user input.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe debian/debian linux10.0
  • cpe rubyonrails/actionpack page-cachingversion unspecified
  • cpe rubyonrails/rails< 5.2.4.6
  • cpe rubyonrails/rails< 6.0.3.7
  • cpe rubyonrails/rails< 6.1.3.1

How to fix CVE-2021-22885

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-22885. EPSS is 4.05%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Compare what you have installed with debian/debian linux 10.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-209. EPSS 4.05%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Ruby on Rails security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 27, 2021 · Monitored products — high

    Detected

    A possible information disclosure / unintended method execution vulnerability in Action Pack >= 2.0.0 when using the or helper with untrusted user input.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    A possible information disclosure / unintended method execution vulnerability in Action Pack >= 2.0.0 when using the or helper with untrusted user input.

Sources

  • CVE.orgVulnerability recordCVE-2021-22885

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2021-22885

    A possible information disclosure / unintended method execution vulnerability in Action Pack >= 2.0.0 when using the or helper with untrusted user input.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 8, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 8, 2026
  • Monitored products — highNov 8, 2026