CVE-2021-3427

Name: CVE-2021-3427
Creator: NVD / NIST
Published: 2022-08-26T16:15:08.803+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.71%

Last modified Jun 17, 2026

CVE-2021-3427 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The Deluge Web-UI is vulnerable to XSS through a crafted torrent file. The the data from torrent files is not properly sanitised as it's interpreted directly as HTML. EPSS estimates a 0.71% chance of exploitation in the next 30 days.

Description

The Deluge Web-UI is vulnerable to XSS 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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.71%

48.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Deluge-Torrent	Deluge	< 2.1.0

References

https://dev.deluge-torrent.org/ticket/3459Exploit, Issue Tracking, Patch, Vendor Advisory
https://groups.google.com/g/deluge-dev/c/e5zh7wT0rEgExploit, Issue Tracking, Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202210-07Third Party Advisory
https://dev.deluge-torrent.org/ticket/3459Exploit, Issue Tracking, Patch, Vendor Advisory
https://groups.google.com/g/deluge-dev/c/e5zh7wT0rEgExploit, Issue Tracking, Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202210-07Third Party Advisory

Timeline

Published: Aug 26, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3427?

How severe is CVE-2021-3427?

CVE-2021-3427 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.71% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3427?

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-2021-3427?

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

Scan your code now

Source: NVD / NIST