CVE-2022-33146: Web2py Open Redirect Vulnerability

MODERATE
Advisory Identifier: GHSA-cgrj-xjm7-9q27
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CVSS 6.1
CWE-601
Published
Advisory Summary

CVE-2022-33146 is a MODERATE (CVSS 6.1) open redirect vulnerability (CWE-601: URL Redirection to Untrusted Site ('Open Redirect')) affecting Web2py libraries in the PyPI ecosystem. The issue involves open redirect in web2py. Remediation is available by upgrading affected packages to version 2.22.5.

CVE-2022-33146 at a Glance

CVE Identifier CVE-2022-33146
GHSA Identifier GHSA-cgrj-xjm7-9q27
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
Affected Product Web2py
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 6.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2022-33146

To remediate this vulnerability, upgrade all affected Web2py dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

web2py fixed: 2.22.5 
pip install web2py>=2.22.5
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show web2py

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2022-33146, inspect your installed packages using pip:

pip show web2py

Analyze the terminal output to locate any version of Web2py in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.22.5), your application is affected.

Note: The pip show web2py command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-601: URL Redirection to Untrusted Site ('Open Redirect'), where the web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. In Web2py, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Open redirect vulnerability in web2py versions prior to 2.22.5 allows a remote attacker to redirect a user to an arbitrary web site and conduct a phishing attack by having a user to access a specially crafted URL.

CVE-2022-33146 Affected Web2py Versions

1 component(s)
Fixed Versions:
2.22.5
Product / Package Ecosystem Affected Versions Fixed Version
web2py
pypi/web2py
PyPI
< 2.22.5
2.22.5

References

NVD — CVE-2022-33146 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-33146
Security Fix Commit FIX COMMIT
https://github.com/web2py/web2py/commit/a181b855a43cb8b479d276b082cfcde385768451
Security Fix Commit FIX COMMIT
https://github.com/web2py/web2py/commit/d9805606f88f00c0be56438247605cefde73e14e#diff-c1d01f37ee54d813815718760b9c4d7b274e2be7ad18f65552cd564336ab593bR110
Web2py Source Repository REPOSITORY
https://github.com/web2py/web2py
jvn.jp/en/jp/jvn02158640/i... WEB
https://jvn.jp/en/jp/JVN02158640/index.html
Web2py Security Information SECURITY
http://web2py.com

Frequently Asked Questions

What is CVE-2022-33146?
CVE-2022-33146 is a security vulnerability in Web2py involving Open redirect in web2py under CWE-601: URL Redirection to Untrusted Site ('Open Redirect').
Which Web2py versions are affected?
Affected versions include releases prior to 2.22.5 across affected packages: web2py.
What version fixes CVE-2022-33146?
Upgrading to 2.22.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is web2py affected?
Yes, web2py is affected in releases prior to 2.22.5. Upgrade your dependency to 2.22.5 or later.
What is the CVSS score of CVE-2022-33146?
CVE-2022-33146 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2022-33146?
CVE-2022-33146 is classified under CWE-601: URL Redirection to Untrusted Site ('Open Redirect') (The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.).
How can I check PyPI dependencies for CVE-2022-33146?
Run the dependency tree command: 'pip show web2py'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-cgrj-xjm7-9q27",
  "modified" : "2022-07-08T17:04:13Z",
  "published" : "2022-06-28T00:01:02Z",
  "aliases" : [ "CVE-2022-33146" ],
  "summary" : "Open redirect in web2py",
  "details" : "Open redirect vulnerability in web2py versions prior to 2.22.5 allows a remote attacker to redirect a user to an arbitrary web site and conduct a phishing attack by having a user to access a specially crafted URL.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "web2py"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.22.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-33146"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/web2py/web2py/commit/a181b855a43cb8b479d276b082cfcde385768451"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/web2py/web2py/commit/d9805606f88f00c0be56438247605cefde73e14e#diff-c1d01f37ee54d813815718760b9c4d7b274e2be7ad18f65552cd564336ab593bR110"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/web2py/web2py"
  }, {
    "type" : "WEB",
    "url" : "https://jvn.jp/en/jp/JVN02158640/index.html"
  }, {
    "type" : "WEB",
    "url" : "http://web2py.com"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-601" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-07-05T22:06:03Z",
    "nvd_published_at" : "2022-06-27T01:15:00Z"
  }
}