CVE-2018-16477

Name: CVE-2018-16477
Creator: NVD / NIST
Published: 2018-11-30T19:29:00.297+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.31%

Last modified Jun 17, 2026

CVE-2018-16477 is a vulnerability of currently unknown severity. A bypass vulnerability in Active Storage >= 5.2.0 for Google Cloud Storage and Disk services allow an attacker to modify the `content-disposition` and `content-type` parameters which can be used in with HTML files and have them executed inline. Additionally, if combined with other techniques such as cookie bombing and specially crafted AppCache manifests, an attacker can gain access to private signed URLs within a specific storage path. EPSS estimates a 1.31% chance of exploitation in the next 30 days.

Description

A bypass vulnerability in Active Storage >= 5.2.0 for Google Cloud Storage and Disk services allow an attacker to modify the `content-disposition` and `content-type` parameters which can be used in with HTML files and have them executed inline. Additionally, if combined with other techniques such as cookie bombing and specially crafted AppCache manifests, an attacker can gain access to private signed URLs within a specific storage path. This vulnerability has been fixed in version 5.2.1.1.

Metrics

EPSS Probability

1.31%

67.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Rubyonrails	Rails	>= 5.2.0, < 5.2.1.1

References

https://groups.google.com/d/msg/rubyonrails-security/3KQRnXDIuLg/mByx5KkqBAAJExploit, Mailing List, Mitigation, Third Party Advisory
https://weblog.rubyonrails.org/2018/11/27/Rails-4-2-5-0-5-1-5-2-have-been-released/Vendor Advisory
https://groups.google.com/d/msg/rubyonrails-security/3KQRnXDIuLg/mByx5KkqBAAJExploit, Mailing List, Mitigation, Third Party Advisory
https://weblog.rubyonrails.org/2018/11/27/Rails-4-2-5-0-5-1-5-2-have-been-released/Vendor Advisory

Timeline

Published: Nov 30, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-16477?

How severe is CVE-2018-16477?

Severity scoring for CVE-2018-16477 is pending analysis. The EPSS model estimates a 1.31% probability of exploitation in the next 30 days.

How do I fix CVE-2018-16477?

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-2018-16477?

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

Scan your code now

Source: NVD / NIST