What’s Vulnerable › Vulnerabilities

CVE-2025-45311

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-11-26 · updated 2026-06-17
• Weakness: CWE-266

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.

References

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

Get alerted when CVE-2025-45311 or the next vulnerability affects your stack