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Fencer Intel
medium 4.3

CVE-2014-3877 json

Incomplete blacklist vulnerability in Frams' Fast File EXchange (F*EX, aka fex) before fex-20140530 allows remote attackers to conduct cros…

published 2014-06-18 12 y ago modified 2026-06-17 4 mo ago also EUVD-2014-3814

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

Incomplete blacklist vulnerability in Frams' Fast File EXchange (F*EX, aka fex) before fex-20140530 allows remote attackers to conduct cross-site scripting (XSS) attacks via the addto parameter to fup.

Patch / fix

  • fex Debian 13, Debian 12 20140530-1

debian advisories DEBIAN-CVE-2014-3877

Exploit prediction

1.91% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • packetstormsecurity.com http://packetstormsecurity.com/files/126906/F-EX-20140313-1-HTTP-Response-Splitting-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified
  • lsexperts.de https://www.lsexperts.de/advisories/lse-2014-05-22.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

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.