CVE-2025-45311HIGH 8.8EPSS p23.3%

CVE-2025-45311CVE-2025-45311

Description

Insecure permissions in fail2ban-client v0.11.2 allows attackers with limited sudo privileges to perform arbitrary operations as root. NOTE: this is disputed by multiple parties because the action for a triggered rule can legitimately be an arbitrary operation as root. Thus, the software is behaving in accordance with its intended privilege model.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS0.32% probability of exploitation · percentile 23.3% · 2026-06-19T12:03:05Z
Published2025-11-26
Last modified2026-04-15

Underlying weaknesses· 1

CWE-266

References

  1. https://gist.github.com/R-Security/1c707a08f9c7f9a91d9d84b5010aaed2
  2. https://github.com/fail2ban/fail2ban/issues/4110
  3. https://packetstorm.news/files/id/189989
  4. http://www.openwall.com/lists/oss-security/2025/12/03/2

1

TypeTargetConfidenceTier
WeaknessIncorrect Privilege Assignmentcwe-2660%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.