What is CVE-2021-47712?

CVE-2021-47712 is a high-severity vulnerability in Kentico Xperience, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.5/10. Published 2025-12-18.

How severe is CVE-2021-47712?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Kentico Xperience

CVE-2021-47712

A cryptography vulnerability in Kentico Xperience allows attackers to potentially manipulate URL hash values through existing hashing mechanisms. The hotfix introduces an additional security layer to prevent hash value reuse and potential…

Vulnerability class: POODLE (CVE-2014-3566)

EPSS: 0.000 (6.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Kentico Xperience — versions 0

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

Kentico DevNet Hotfixes (vendor-advisory, patch)
VulnCheck Advisory: Kentico Xperience <= 12.0.102 URL Hashing Cryptography Vulnerability (third-party-advisory)

Frequently asked questions

What is CVE-2021-47712?: CVE-2021-47712 is a high-severity vulnerability in Kentico Xperience, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.5/10. Published 2025-12-18.
How severe is CVE-2021-47712?: High severity. CVSS v3 base score is 7.5 out of 10.