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    CVE-2025-45311

    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.

    Published:Nov 26, 2025
    Last Modified:Apr 15, 2026
    EPS:Nov 26, 2025
    EPSS Score:0.00079
    CVSS Score:8.8

    Affected Products

    Vendor
    Fail2ban
    Product
    Fail2ban

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-266 Incorrect Privilege Assignment

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2009-5023 (CVSS 4.7) — The (1) dshield.conf, (2) mail-buffered.conf, (3) mynetwatchman.conf, and (4) mynetwatchman.conf actions in ac…
    CVE-2013-7177 (CVSS 5) — config/filter.d/cyrus-imap.conf in the cyrus-imap filter in Fail2ban before 0.8.11 allows remote attackers to …
    CVE-2013-7176 (CVSS 5) — config/filter.d/postfix.conf in the postfix filter in Fail2ban before 0.8.11 allows remote attackers to trigge…
    CVE-2013-2178 (CVSS 5) — The apache-auth.conf, apache-nohome.conf, apache-noscript.conf, and apache-overflows.conf files in Fail2ban be…
    CVE-2012-5642 (CVSS 7.5) — server/action.py in Fail2ban before 0.8.8 does not properly handle the content of the matches tag, which might…
    CVE-2009-0362 (CVSS 4) — filter.d/wuftpd.conf in Fail2ban 0.8.3 uses an incorrect regular expression that allows remote attackers to ca…
    CVE-2007-4321 (CVSS 6.8) — fail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrar…
    CVE-2006-6302 (CVSS 5) — fail2ban 0.7.4 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitr…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High