How severe is CVE-2021-47712?

CVE-2021-47712 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-47712 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47712?

CVE-2021-47712 affects Kentico Xperience. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47712?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2021-47712 have an EU (EUVD) identifier?

Yes. CVE-2021-47712 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204349.

When was CVE-2021-47712 published?

CVE-2021-47712 was published on 2025-12-18 and last updated on 2026-06-17.

CVE-2021-47712

CVE-2021-47712 is a high-severity vulnerability in Kentico Xperience with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-327.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 6.9
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204349
Weakness: CWE-327
Affected product: Kentico Xperience
Published: 2025-12-18
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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 exploitation.
How severe is CVE-2021-47712?: CVE-2021-47712 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-47712 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47712?: CVE-2021-47712 affects Kentico Xperience. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47712?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2021-47712 have an EU (EUVD) identifier?: Yes. CVE-2021-47712 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204349.
When was CVE-2021-47712 published?: CVE-2021-47712 was published on 2025-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kentico:xperience:*:*:*:*:*:*:*:*

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