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Fencer Vulns
high 7.8

CVE-2018-17984 json

An unanchored /[a-z]{2}/ regular expression in ISPConfig before 3.1.13 makes it possible to include arbitrary files, leading to code execut…

published 2018-10-04 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-9723

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

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.

Patch / fix

  • ispconfig ispconfig 3.1.13

Exploit prediction

3.37% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • 0x09al.github.io https://0x09al.github.io/security/ispconfig/exploit/vulnerability/2018/08/20/bug-or-backdoor-ispconfig-rce.html referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/0x09AL/0x09al.github.io/blob/master/_posts/2018-08-20-bug-or-backdoor-ispconfig-rce.markdown referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-185 Incorrect Regular Expression

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.