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Fencer Vulns
medium 5.4

CVE-2019-19493 json

Kentico before 12.0.50 allows file uploads in which the Content-Type header is inconsistent with the file extension, leading to XSS.

published 2019-12-02 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-9113

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
1
Exploit-DB

Summary

Kentico before 12.0.50 allows file uploads in which the Content-Type header is inconsistent with the file extension, leading to XSS.

Patch / fix

  • kentico xperience 12.0.50

Timeline

  1. Published
  2. First public exploit (EDB-48864)

Exploit prediction

2.02% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-48864 Kentico CMS 9.0-12.0.49 - Persistent Cross Site Scripting webapps, 2020-10-09
  • packetstormsecurity.com http://packetstormsecurity.com/files/159525/Kentico-CMS-9.0-12.0.49-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type
  • CWE-706 Use of Incorrectly-Resolved Name or Reference

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.