CVE-2021-22885

Name: CVE-2021-22885
Creator: NVD / NIST
Published: 2021-05-27T12:15:07.797+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 4.20%

Last modified Jun 17, 2026

CVE-2021-22885 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A possible information disclosure / unintended method execution vulnerability in Action Pack >= 2.0.0 when using the `redirect_to` or `polymorphic_url`helper with untrusted user input.. EPSS estimates a 4.20% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

4.20%

89.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rubyonrails	Rails	>= 5.2.0.0, < 5.2.4.6
Rubyonrails	Rails	>= 6.0.0.0, < 6.0.3.7
Rubyonrails	Rails	>= 6.1.0.0, < 6.1.3.1
Rubyonrails	Actionpack Page-Caching	All versions
Debian	Debian Linux	10.0

References

https://hackerone.com/reports/1106652Exploit, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210805-0009/Third Party Advisory
https://www.debian.org/security/2021/dsa-4929Third Party Advisory
https://hackerone.com/reports/1106652Exploit, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210805-0009/Third Party Advisory
https://www.debian.org/security/2021/dsa-4929Third Party Advisory

Timeline

Published: May 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22885?

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

How severe is CVE-2021-22885?

CVE-2021-22885 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22885?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22885?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST