---
title: "CVE-2021-33393: lfs/backup in IPFire 2.25-core155… | CubePath"
description: "lfs/backup in IPFire 2.25-core155 does not ensure that /var/ipfire/backup/bin/backup.pl is owned by the root account. It might be owned…"
language: en
source: https://cubepath.com/security/cve/CVE-2021-33393
---

# CVE-2021-33393: lfs/backup in IPFire 2.25-core155… | CubePath

## Description

lfs/backup in IPFire 2.25-core155 does not ensure that /var/ipfire/backup/bin/backup.pl is owned by the root account. It might be owned by an unprivileged account, which could potentially be used to install a Trojan horse backup.pl script that is later executed by root. Similar problems with the ownership/permissions of other files may be present as well.

Official description from the CVE record, published by mitre. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-33393)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.59349 (59.3% probability)

Percentile

99.1%

Scores of

Nov 10, 2026

Model

v2026.06.15

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [github.com/MucahitSaratar/ipfire-2-25-auth-rce](https://github.com/MucahitSaratar/ipfire-2-25-auth-rce)
- [github.com/ipfire/ipfire-2.x/commit/6769d909306d7bdc43d6459…](https://github.com/ipfire/ipfire-2.x/commit/6769d909306d7bdc43d64598872126fcf1b217f6)
- [github.com/ipfire/ipfire-2.x/commits/master?since=2021-05-1…](https://github.com/ipfire/ipfire-2.x/commits/master?since=2021-05-17&until=2021-05-17)
- [packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Cod…](http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.html)

## Timeline

1. ID reserved May 20, 2021
2. Record published Jun 9, 2021
3. Record last updated Aug 3, 2024

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:04 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)