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CVE-2021-3427: Deluge Web-UI vulnerable to XSS through a crafted torrent file

August 27, 2022 (updated September 16, 2024)

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.

References

  • dev.deluge-torrent.org/ticket/3459
  • github.com/advisories/GHSA-5c8p-qhch-qhx6
  • github.com/deluge-torrent/deluge
  • github.com/pypa/advisory-database/tree/main/vulns/deluge/PYSEC-2022-256.yaml
  • groups.google.com/g/deluge-dev/c/e5zh7wT0rEg
  • nvd.nist.gov/vuln/detail/CVE-2021-3427
  • security.gentoo.org/glsa/202210-07

Code Behaviors & Features

Detect and mitigate CVE-2021-3427 with GitLab Dependency Scanning

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Affected versions

All versions before 2.1.0

Fixed versions

  • 2.1.0

Solution

Upgrade to version 2.1.0 or above.

Impact 6.1 MEDIUM

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

Learn more about CVSS

Weakness

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Source file

pypi/deluge/CVE-2021-3427.yml

Spotted a mistake? Edit the file on GitLab.

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