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Case File

CVE-2021-33393

HIGH · CVSS 8.8 EPSS 58.73% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-06-09 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.8. Public exploit code or proof-of-concept references have been detected in its references. Its EPSS score suggests a 58.7% probability of exploitation in the next 30 days.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

External Security References

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-33393
Severity
HIGH
CVSS
8.8
EPSS
58.73%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)