Vulnerabilities in pkg:pypi/deluge

PACKAGE
Advisory Identifier: GHSA-5c8p-qhch-qhx6
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Advisory Summary

CVE-2021-3427 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Deluge libraries in the PyPI ecosystem. The issue involves deluge web-ui vulnerable to xss through a crafted torrent file. Remediation is available by upgrading affected packages to version 2.1.0.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:pypi/deluge

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:pypi/deluge. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-5c8p-qhch-qhx6 CVE-2021-3427 MODERATE Deluge Web-UI vulnerable to XSS through a crafted torrent file

CVE-2021-3427 at a Glance

CVE Identifier CVE-2021-3427
GHSA Identifier GHSA-5c8p-qhch-qhx6
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Deluge
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-2021-3427

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

deluge fixed: 2.1.0 
pip install deluge>=2.1.0
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 deluge

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2021-3427, inspect your installed packages using pip:

pip show deluge

Analyze the terminal output to locate any version of Deluge in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.1.0), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Deluge, 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

The Deluge Web-UI is vulnerable to cross-site scripting through a crafted torrent file. The the data from torrent files is not properly sanitised as it's interpreted directly as HTML. Someone who supplies the user with a malicious torrent file can execute arbitrary Javascript code in the context of the user's browser session.

CVE-2021-3427 Affected Deluge Versions

1 component(s)
Fixed Versions:
2.1.0
Product / Package Ecosystem Affected Versions Fixed Version
deluge
pypi/deluge
PyPI
< 2.1.0
2.1.0

References

groups.google.com/g/deluge-dev/c/e5zh... WEB
https://groups.google.com/g/deluge-dev/c/e5zh7wT0rEg
NVD — CVE-2021-3427 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3427
Deluge Security Information SECURITY
https://dev.deluge-torrent.org/ticket/3459
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-5c8p-qhch-qhx6
Deluge Source Repository REPOSITORY
https://github.com/deluge-torrent/deluge
Deluge Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/deluge/PYSEC-2022-256.yaml
Deluge Security Information SECURITY
https://security.gentoo.org/glsa/202210-07

Frequently Asked Questions

What is CVE-2021-3427?
CVE-2021-3427 is a security vulnerability in Deluge involving Deluge Web-UI vulnerable to XSS through a crafted torrent file under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Deluge versions are affected?
Affected versions include releases prior to 2.1.0 across affected packages: deluge.
What version fixes CVE-2021-3427?
Upgrading to 2.1.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is deluge affected?
Yes, deluge is affected in releases prior to 2.1.0. Upgrade your dependency to 2.1.0 or later.
What is the CVSS score of CVE-2021-3427?
CVE-2021-3427 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-2021-3427?
CVE-2021-3427 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check PyPI dependencies for CVE-2021-3427?
Run the dependency tree command: 'pip show deluge'. 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-5c8p-qhch-qhx6",
  "modified" : "2024-09-16T13:50:34Z",
  "published" : "2022-08-27T00:00:44Z",
  "aliases" : [ "CVE-2021-3427" ],
  "summary" : "Deluge Web-UI vulnerable to XSS through a crafted torrent file",
  "details" : "The Deluge Web-UI is vulnerable to cross-site scripting through a crafted torrent file. The the data from torrent files is not properly sanitised as it's interpreted directly as HTML. Someone who supplies the user with a malicious torrent file can execute arbitrary Javascript code in the context of the user's browser session.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "deluge"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-3427"
  }, {
    "type" : "WEB",
    "url" : "https://dev.deluge-torrent.org/ticket/3459"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-5c8p-qhch-qhx6"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/deluge-torrent/deluge"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/deluge/PYSEC-2022-256.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/deluge-dev/c/e5zh7wT0rEg"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/202210-07"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-09-01T22:19:29Z",
    "nvd_published_at" : "2022-08-26T16:15:00Z"
  }
}