CVE-2021-47712: A cryptography vulnerability in Kentico Xperience allows attackers to potentially manipulate URL hash values t

Q: How do I fix CVE-2021-47712?

xperience: upgrade to newer than 12.0.102. Exact commands for each OS are on this page.

Q: Is CVE-2021-47712 being exploited?

CVE-2021-47712 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-47712 affect?

CVE-2021-47712 affects xperience. Severity is high (CVSS 7.5). 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 e

Q: How urgent is CVE-2021-47712?

Priority 35/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.5REMOTEUPGRADE

CVE-2021-47712 is a high-severity flaw (CVSS 7.5) affecting xperience. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 exploitation.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-327
Published	2025-12-18
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: kentico

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-18 20:15 UTCPublished CVE record published
2026-06-17 04:18 UTCUpdated Record last modified

kentico xperience UPGRADE

Affected: <= 12.0.102

Fixed in: newer than 12.0.102

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy xperience || rpm -q xperience || xperience --version

2. UPGRADE to newer than 12.0.102 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade xperience

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xperience

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-47712?

xperience: upgrade to newer than 12.0.102. Exact commands for each OS are on this page.

Is CVE-2021-47712 being exploited?

CVE-2021-47712 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-47712 affect?

CVE-2021-47712 affects xperience. Severity is high (CVSS 7.5). 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 e

How urgent is CVE-2021-47712?

Priority 35/100. High severity; Remotely exploitable, no login, no user action

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References

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