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Fencer Vulns
critical 9.1

CVE-2021-34363 json

The Fuck Arbitrary File Deletion via Path Traversal

published 2021-06-10 5 y ago modified 2026-06-17 4 mo ago also GHSA-8wwf-2644-f8x4 , PYSEC-2021-97 , EUVD-2021-0453

cvss
9.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

The thefuck (aka The Fuck) package before 3.31 for Python allows Path Traversal that leads to arbitrary file deletion via the "undo archive operation" feature.

Patch / fix

  • pypi thefuck 3.31
  • the_fuck_project the_fuck 3.31
  • thefuck Debian 14, Debian 13, Debian 12 3.29-0.3

debian advisories DEBIAN-CVE-2021-34363

  • thefuck Arch Linux 3.31-1

arch linux advisories AVG-2062

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-34363 updated cvss 5.0

thefuck: arbitrary file deletion via path traversal

  • Red Hat All currently supported Red Hat products
    not 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

1.85% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:N/I:P/A:P
GitHub 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected packages

ecosystem package affected fixed in
pypi thefuck
<3.31
3.31

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns 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.