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Fencer Intel
critical 9.0

CVE-2011-4800 json

Directory traversal vulnerability in Serv-U FTP Server before 11.1.0.5 allows remote authenticated users to read and write arbitrary files,…

published 2011-12-14 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4718

cvss
9.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.0%
EPSS 7.0% chance of exploitation in 30 days, percentile 94%
public exploits
1
Exploit-DB

Summary

Directory traversal vulnerability in Serv-U FTP Server before 11.1.0.5 allows remote authenticated users to read and write arbitrary files, and list and create arbitrary directories, via a "..:/" (dot dot colon forward slash) in the (1) list, (2) put, or (3) get commands.

Timeline

  1. First public exploit (EDB-18182)
  2. Published

Exploit prediction

6.99% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-18182 Serv-U FTP Server - Jail Break remote, 2011-12-01
  • archives.neohapsis.com http://archives.neohapsis.com/archives/fulldisclosure/2011-11/0454.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Intel 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.