What’s Vulnerable › Vulnerabilities

CVE-2018-17984

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-10-04 · updated 2026-06-17
• Weakness: CWE-185

Description

An unanchored /[a-z]{2}/ regular expression in ISPConfig before 3.1.13 makes it possible to include arbitrary files, leading to code execution. This is exploitable by authenticated users who have local filesystem access.

Affected products

• ISPConfig: before 3.1.13 — fixed in 3.1.13

How to fix

Upgrade to a fixed version: ISPConfig 3.1.13. Check the vendor advisory for mitigations.

References

• https://0x09al.github.io/security/ispconfig/exploit/vulnerability/2018/08/20/bug-or-backdoor-ispconfig-rce.html
• https://github.com/0x09AL/0x09al.github.io/blob/master/_posts/2018-08-20-bug-or-backdoor-ispconfig-rce.markdown
• https://www.ispconfig.org/blog/ispconfig-3-1-13-released-important-security-bugfix/
• https://0x09al.github.io/security/ispconfig/exploit/vulnerability/2018/08/20/bug-or-backdoor-ispconfig-rce.html
• https://github.com/0x09AL/0x09al.github.io/blob/master/_posts/2018-08-20-bug-or-backdoor-ispconfig-rce.markdown
• https://www.ispconfig.org/blog/ispconfig-3-1-13-released-important-security-bugfix/

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