CVE-2021-44528 json
actionpack Open Redirect in Host Authorization Middleware
published 4y ago modified 4mo ago also BIT-rails-2021-44528 , EUVD-2021-2571 , GHSA-qphc-hf5q-v8fc
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.4%
- EPSS 4.4% chance of exploitation in 30 days, percentile 91%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
A open redirect vulnerability exists in Action Pack >= 6.0.0 that could allow an attacker to craft a "X-Forwarded-Host" headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website.
Patch / fix
- rubygems actionpack 6.0.4.2, 6.1.4.2
- rails Debian 14, Debian 13, Debian 12 2:6.1.4.6+dfsg-1
debian advisories DEBIAN-CVE-2021-44528
- rubygem-actionpack-6.0 openSUSE Tumbleweed 6.0.4.4-1.1
opensuse advisories openSUSE-SU-2024:11821-1
- github.com/rails/rails@0fccfb9 commit
- github.com/rails/rails@aecba3c commit
Is CVE-2021-44528 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerVendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2021-44528 updated cvss 5.4
rubygem-actionpack: specially crafted "X-Forwarded-Host" headers may lead to open redirect
-
Red Hat Satellite 6 tfm-rubygem-actionpacknot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
4.42% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Nuclei template Open Redirect in Host Authorization Middleware nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| rubygems | actionpack | >=6.0.0, <6.0.4.2 >=6.1.0, <6.1.4.2 |
6.0.4.2 6.1.4.2 |
| bitnami | rails | >=7.0.0-rc2, <=7.0.0-rc2 |
no fix listed |
Affected products
- n/a https://github.com/rails/rails
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
- Technology feeds
References
-
github.com
/rails/rails/commit/0fccfb9a3097a9c4260c791f1a40b128517e7815
web, patch, third-party-advisory
-
github.com
/rails/rails/commit/aecba3c301b80e9d5a63c30ea1b287bceaf2c107
web
-
debian.org
/security/2023/dsa-5372
vendor-advisory, web
-
security.netapp.com
/advisory/ntap-20240208-0003/
web
-
nvd.nist.gov
/vuln/detail/CVE-2021-44528
advisory
-
github.com
/rails/rails
package
-
github.com
/rails/rails/blob/v6.1.4.2/actionpack/CHANGELOG.md#rails-6142-december-14-2021
web
-
github.com
/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2021-44528.yml
web
-
groups.google.com
/g/ruby-security-ann/c/vG9gz3nk1pM/m/7-NU4MNrDAAJ
web
-
groups.google.com
/g/ruby-security-ann/c/vG9gz3nk1pM/m/7-NU4MNrDAAJ?utm_medium=email&utm_source=footer
web
-
security.netapp.com
/advisory/ntap-20240208-0003
web
Sources
- CVE List CVE-2021-44528
- GitHub Advisory GHSA-qphc-hf5q-v8fc
- NVD CVE-2021-44528
- OSV BIT-rails-2021-44528
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.